Notes for 20-21 May 04 MEX BSR Experiment (Mars Northern Plains) Files and sources DKF: mger1:/domops/data/sle/41/seq/misc/dkf/xd019a.01.dkf ????? May ?? ??:?? TSOE: mger1:/domops/data/sle/41/seq/misc/tsoe/xd019a.01.tsoe ????? May ?? ??:?? NOPE and Other Personnel: Jesse Velasco will be on duty Jose Valencia at DSS 14 166 x230 (console) Art Freiley at DSS 14 166 x230 (console) Contact Info: Martin Paetzold FAX: (49) 221-470-5198 Martin Paetzold TEL: (49) 221-470-3385 TCXO Frequency: S-band 2296.482 MHz X-band 8420.432 MHz ERT Activity Quant SRCP=RSR2A SLCP=RSR2B XRCP=RSR3A XLCP=RSR3B RSR rms SNR other rms SNR other rms SNR other rms SNR other --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:14:00 RSR's configured and FGAIN 29 40 29 40 28 60 28 60 R recording; DSS 14 at ATT 16.0 20.5 23.5 21.5 zenith; all receivers on fsamp 25000 25000 25000 25000 ambient loads. Displays set nbits 16 16 16 16 for sum of 5 1024-point FRO 0 0 0 0 FFTs = 0.205s MODE 1-W 1-W 1-W 1-W --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:15:40 X-RCP ND ON 30 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:20:50 X-band to sky 11 7 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:25:30 X-RCP ND OFF 29 7 7 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:29 Ambient load temps S1 17.5 R S2 22.69 X1 12.06 12.06 --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:30:50 X-LCP ND ON 29 9 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:35:00 X-band to AMB load 29 29 29 29 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:37 DSS 14 reports sky clear; R 14 MPH wind from WSW --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:40:41 X-LCP ND OFF 29 28 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:46:10 X-band to sky; 30 29 7 6 R S-RCP ND ON --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:51:20 S-RCP to sky 10 28 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 22:55:45 S-RCP ND OFF 8 28 7 6 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 23:01:10 S-LCP ND ON 7 29 6 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 23:05:30 S-LCP to sky 11 6 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 23:10:50 S-LCP ND OFF 7 9 7 6 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 23:14 Ambient load temps S1 17.5 R S2 22.8 S3 12.1 12.1 --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 23:16:00 Stop RSR recording --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 23:36 df 8 41 -1100 -- 7 -- --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 23:45 S-band carrier in lock df 8 44 -1171 7 --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:08 S-band drifting (2-W acquisition) --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:13 X-band acquisition 44 65 --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:15 X-band TLM ON 43 56 --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:20 X-band TLM in lock --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:21- Add FRO to center FRO -21000 8 -21000 7 51 -77000 6 28 -77000 00:22 2-W carrier --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:30:00 Start RSR recording R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:31 8 -- 7 56 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:35 Modulation OFF 8 43 9 -- 7 65 7 35 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:51:28 S/C goes 1-way df +20000 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:54 Change FRO FRO 8 43 +20000 -- +20000 7 66 +75000 +75000 R df -25 -800 --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:56:00 Begin slew 8 43 7 63 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:57:00 8 42 7 50 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 00:58:00 8 41 7 46 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:01:00 -- 26 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:02:30 8 21 7 28 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:04:12 Reset subreflector R controller --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:07:00 8 -- 7 23 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:08 df 8 -- 7 30 -900 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:11:40 RCP ND's ON 11 -- 11 22 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:13 11 -- 8 -- 11 -- 7 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:14:50 S-RCP ND OFF 8 -- 11 -- R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:17:00 S-LCP ND ON 8 -- 10 -- 11 7 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:18:40 9 -- R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:20:40 X-RCP ND OFF 9 8 7 -- R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:21:40 LCP ND's ON 11 9 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:26:00 10 9 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:28 LCP ND's OFF 8 7 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:30 CLR's configured for RCP R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:38 Changed displays to sum 16 df 8 -- 8 11 7 11 7 17 -964 R 8192 pt FFT's = 5.243 s --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 01:50 df 8 5 9 8 7 17 -909 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 02:00 Carrier in both LCP; but no df 8 10 7 18 -905 R surface echoes --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 02:10 Carrier on all 4 channels; 8 9 8 8 8 9 7 16 R no surface echoes --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 02:15 RCP ND's ON 11 11 7 17 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 02:20 RCP ND's OFF 8 8 8 7 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 02:21 LCP ND's ON; carrier 11 8 10 14 R visible on LCPs --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 02:25:40 LCP ND's OFF 9 7 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 02:30:00 Stop RSR recording --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 02:30:10 S-band TX OFF --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 03:44 df +12000 --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 03:45 S/C goes 1-way; several FRO to center X-RCP --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 03:48 Start RSR3A recording df 9 56 175 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:00:09 Occultation ingress 9 -- R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:15:00 End of track; start RSR2A, R RSR2B, and RSR3B recording. --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:18:00 9 9 9 8 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:21 8 9 7 7 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:31 DSS 14 in stow; all 29 28 30 28 R receivers to ambient loads --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:33 RCP ND's ON 31 28 31 28 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:35 Ambient load temps S1 18.12 R S2 22.12 X1 12.56 12.56 --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:37 RCP ND's OFF 29 29 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:38:30 30 28 30 28 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:44:50 30 28 30 28 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:45:20 X-LCP ND ON; 28 29 R S-LCP ND unknown --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:46:20 29 28 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:48:20 DTT 02 reconfigured for 28 28 R S-LCP --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:50:00 29 29 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:53:30 All receivers to sky; 9 21 29 28 R DSS 14 confirms X-band to sky --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:56:50 14 13 7 6 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:57:30 CLR's configured for RCP 16 6 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:59 10 9 7 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 04:59:30 RCP ND's ON 11 13 11 6 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 05:02:00 11 9 11 7 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 05:03 RCP ND's OFF 8 9 7 6 R --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 05:05:00 Stop RSR recording --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- 05:06 Ambient load temps S1 18.56 S2 22.06 X1 12.94 12.94 --------+---------------------------+-------+---+---+------+---+---+------+---+---+------+---+---+------+--- Quant: S1 S-band LNA-1 ambient load physical temperature (deg C) S2 S-band LNA-2 ambient load physical temperature (deg C) X1 X-band ambient load physical temperature (deg C) fsamp RSR sampling frequency (complex samples per second) nbits number of bits per I or Q RSR sample FRO RSR offset frequency (Hz) FGAIN RSR gain (dB) ATT RSR input (DIG) attenuator setting (dB) df carrier offset from center of passband Notes: 1. Briefing message should refer to 12.5K diodes rather than 15K diodes 2. Briefing message should refer to PRFREA display for ambient load physical temperatures, not the CALREDC display 3. If two noise diodes are running simultaneously, three commands are required to disable them: disable the first, disable the second, disable the first. But even this did not work sometimes; forcing reconfigurations of the cloased loop receivers and significant delays. It may be better to modify the procedure so that only a single noise diode is running at any one time. 4. Stowing the antenna and reconfiguring the receivers to the ambient loads after the pass seems to take 15-20 minutes. The time allocated in the procedure needs to be extended to accommodate this. 5. During the BSR post-cal, the noise levels were all over the place. Some of this was probably due to not being able to control two noise diodes simultaneously (Note 3, above). But there may have been other causes - possibly other tear-down activities that interfered with the BSR post-cal. It would be good to keep these out of the BSR post-cal period, but it is hard to make a recommendation without knowing the cause(s). Dick Simpson Original : 20 May 2004 Revised: 21 May 2004 23 May 2004 To: Art Freiley From: Dick Simpson Subject: Noise Calibrations at DSS 14 Table below summarizes RSR results from noise measurements made at DSS 14. For 20 May, only the X-RCP data have been analyzed; I will fill out the table as that work is completed. The methods varied as I gained experience. For 13 and 20 May I compared nearby 5-minute intervals; longer averages did not appear to help, perhaps because of gain changes. In some cases (such as when the Noise Instrumentation was running), there was less than 5 minutes in an interval. Analysis of the 8 April data was not as careful; I took adjacent intervals, some of which were more than 30 minutes. The table shows the number N of different calculations (pairings), minimum and maximum values, and (sometimes) an average. In a small number of cases I compared one sky measurement against two ambient load measurements - or vice versa. N should thus be interpreted loosely - the amount of data going into each calculation varied, and not all of the results are independent. Ambient load data were compared against sky data to obtain Top. Sometimes the two intervals were adjacent, sometimes noise diode measurements fell between (up to 10 minutes spacing). Tndu is the noise diode temperature from comparing ambient load levels with levels when the noise diode was added to the ambient load. Tndl is the noise diode temperature from comparing sky noise levels (zenith) with and without the noise diode; a nearby Top was taken to be the reference. Channel Quantity Date N Minimum Maximum Average ------- -------- ---------- -- ------- ------- ------- S-LCP Tndu 2004-04-08 4 11.30 12.20 11.60 S-RCP Top 2004-04-08 3 19.75 20.27 S-RCP Tndu 2004-04-08 2 14.67 15.74 S-RCP Tndl 2004-04-08 2 16.25 16.34 X-LCP Top 2004-04-08 2 18.48 18.49 X-LCP Tndu 2004-04-08 2 16.25 16.34 X-LCP Tndl 2004-04-08 2 17.16 17.76 X-RCP Top 2004-04-08 3 19.60 19.85 X-RCP Tndu 2004-04-08 2 20.48 22.96 X-RCP Tndl 2004-04-08 2 21.58 22.20 S-LCP Top 2004-05-13 5 23.49 24.16 23.71 S-LCP Tndu 2004-05-13 3 12.07 12.93 12.58 S-LCP Tndl 2004-05-13 3 12.08 12.36 12.20 S-RCP Top 2004-05-13 7 19.08 19.28 19.13 S-RCP Tndu 2004-05-13 4 15.60 16.16 15.81 S-RCP Tndl 2004-05-13 4 16.06 16.10 16.09 X-LCP Top 2004-05-13 10 17.16 17.37 17.28 X-LCP Tndu 2004-05-13 3 15.35 17.31 16.28 X-LCP Tndl 2004-05-13 3 17.40 17.60 17.50 X-RCP Top 2004-05-13 1 18.34 X-RCP Tndu 2004-05-13 1 23.76 X-RCP Tndl 2004-05-13 1 23.58 X-RCP Top 2004-05-20 5 18.38 18.67 X-RCP Tndu 2004-05-20 2 22.60 23.05 X-RCP Tndl 2004-05-20 2 23.25 23.37 Although there are some variations, the X-RCP results from 13 and 20 May look pretty consistent. In fact, on 13 May I could see no differences across the entire test, so lumped all the measurements from each configuration into a single calculation (hence the N=1). I'll attach the X-RCP spreadsheet from 20 May to this message. As before, the first part of the spreadsheet gives the raw data - in the form of 8-point power spectra averaged over 10 seconds. Column A gives the center time in seconds from 0h; columns B-D give the center time in hh-mm-ss, rounded down to the nearest while second; and columns E-L ('windows' 1-8) give the power in each of the eight 3125 Hz spectral bins. There are 1410 rows, corresponding to 14100 seconds of data collection. Note breaks after rows 390 and 1110 when we stopped RSR recording. The raw data are color-coded: ambient load measurements are orange, ambient load plus noise diode are red, sky plus noise diode are green, and sky alone is blue; 'other' conditions are black. Blue and green were used to code data during the track. Rows 1412-1451 in the spreadsheet give averages over the color-coded ranges. For example, row 1414 gives the average values for the eight frequency ranges in rows 1-23 (22:11:04 - 22:14:44) at the top of the spreadsheet. Rows 1453-1491 give the corresponding standard deviations, and rows 1493-1532 give the ratios of standard deviations to averages expressed in percent. The values in row 1553 are large because the noise level dropped about 30 percent as the antenna went from its end-of-track position to zenith. The numbers used to calculate temperatures are shown in rows 1534-1573, column E. These are sums of the window values, except that column H was omitted since it contains the spacecraft carrier during the actual track. Rows 1534-1536 columns G-H contain constants which you provided. Rows 1534-1538, columns J-L contain the physical temperatures of the ambient loads where the row number corresponding to the time the numbers were read is in column J. The corresponding Tamb values are listed in rows 1540-1543 columns J-K. The five estimates of Top are shown in rows 1545-1549, columns J-K. The first is derived from Tamb in row 1540 row L, the power measured in the ambient load configuration on row 1536 column E, and the sky power in row 1539 row E. Estimates of the equivalent noise diode temperature are shown in rows 1551-1556, rows J-L. Finally, the estimates of Tsys during the track are shown in rows 1558- 1560, columns J-L, where the first two bracket the bistatic radar and the third was the value at the end of the track. I'll plan to FAX you copies of the plots which show log(power) versus time in X-RCP. The annotations indicate the spreadsheet rows corresponding to each time interval. 25 May 2004 To: Art Freiley From: Dick Simpson Subject: Noise Calibrations at DSS 14 Table below summarizes RSR results from noise measurements made at DSS 14. For 20 May, both X-RCP and S-RCP data have been analyzed; I will fill out the table as analysis of the remaining two channels is completed. The methods varied as I gained experience. For 13 and 20 May I compared nearby 5-minute intervals; longer averages did not appear to help, perhaps because of gain changes. In some cases (such as when the Noise Instrumentation was running), there was less than 5 minutes in an interval. Analysis of the 8 April data was not as careful; I took adjacent intervals, some of which were more than 30 minutes. The table shows the number N of different calculations (pairings), minimum and maximum values, and (sometimes) an average. In a small number of cases I compared one sky measurement against two ambient load measurements - or vice versa. N should thus be interpreted loosely - the amount of data going into each calculation varied, and not all of the results are independent. Ambient load data were compared against sky data to obtain Top. Sometimes the two intervals were adjacent, sometimes noise diode measurements fell between (up to 10 minutes spacing). Tndu is the noise diode temperature from comparing ambient load levels with levels when the noise diode was added to the ambient load. Tndl is the noise diode temperature from comparing sky noise levels (zenith) with and without the noise diode; a nearby Top was taken to be the reference. Channel Quantity Date N Minimum Maximum Average ------- -------- ---------- -- ------- ------- ------- S-LCP Tndu 2004-04-08 4 11.30 12.20 11.60 S-RCP Top 2004-04-08 3 19.75 20.27 S-RCP Tndu 2004-04-08 2 14.67 15.74 S-RCP Tndl 2004-04-08 2 16.25 16.34 X-LCP Top 2004-04-08 2 18.48 18.49 X-LCP Tndu 2004-04-08 2 16.25 16.34 X-LCP Tndl 2004-04-08 2 17.16 17.76 X-RCP Top 2004-04-08 3 19.60 19.85 X-RCP Tndu 2004-04-08 2 20.48 22.96 X-RCP Tndl 2004-04-08 2 21.58 22.20 S-LCP Top 2004-05-13 5 23.49 24.16 23.71 S-LCP Tndu 2004-05-13 3 12.07 12.93 12.58 S-LCP Tndl 2004-05-13 3 12.08 12.36 12.20 S-RCP Top 2004-05-13 7 19.08 19.28 19.13 S-RCP Tndu 2004-05-13 4 15.60 16.16 15.81 S-RCP Tndl 2004-05-13 4 16.06 16.10 16.09 X-LCP Top 2004-05-13 10 17.16 17.37 17.28 X-LCP Tndu 2004-05-13 3 15.35 17.31 16.28 X-LCP Tndl 2004-05-13 3 17.40 17.60 17.50 X-RCP Top 2004-05-13 1 18.34 X-RCP Tndu 2004-05-13 1 23.76 X-RCP Tndl 2004-05-13 1 23.58 S-RCP Top 2004-05-20 3 18.73 19.08 18.85 S-RCP Tndu 2004-05-20 5 14.83 16.49 15.99 S-RCP Tndl 2004-05-20 3 15.82 15.86 15.83 X-RCP Top 2004-05-20 5 18.38 18.67 X-RCP Tndu 2004-05-20 2 22.60 23.05 X-RCP Tndl 2004-05-20 2 23.25 23.37 Although there are some variations, the X-RCP and S-RCP results from 13 and 20 May look pretty consistent. In fact, on 13 May I could see no X-RCP differences across the entire test, so lumped all the measurements from each configuration into a single calculation (hence the N=1). I'll attach the S-RCP spreadsheet from 20 May to this message. I had sent the X-RCP spreadsheet with yesterday's report. As before, the first part of the spreadsheet gives the raw data - in the form of 8-point power spectra averaged over 10 seconds. Column A gives the center time in seconds from 0h; columns B-D give the center time in hh-mm-ss, rounded down to the nearest while second; and columns E-L ('windows' 1-8) give the power in each of the eight 3125 Hz spectral bins. There are 1410 rows, corresponding to 14100 seconds of data collection. Note breaks after rows 390 and 1110 when we stopped RSR recording. The raw data are color-coded: ambient load measurements are orange, ambient load plus noise diode are red, sky plus noise diode are green, and sky alone is blue; 'other' conditions are black. Blue and green were used to code data during the track. Rows 1412-1451 in the spreadsheet give averages over the color-coded ranges. For example, row 1414 gives the average values for the eight frequency ranges in rows 1-174 (22:11:04 - 22:39:54) at the top of the spreadsheet. Rows 1453-1491 give the corresponding standard deviations, and rows 1493-1532 give the ratios of standard deviations to averages expressed in percent. The values in row 1519 are large because the noise level dropped about 30 percent as the antenna went from its end-of-track position to zenith. The numbers used to calculate temperatures are shown in rows 1534-1573, column E. These are sums of the window values, except that columns H and I were omitted since they contain the spacecraft carrier during the actual track. Rows 1534-1536 columns G-H contain constants which you provided. Rows 1534-1538, columns J-L contain the physical temperatures of the ambient loads where the row number corresponding to the time the numbers were read is in column J. The corresponding Tamb values are listed in rows 1540-1543 columns J-K. The three estimates of Top are shown in rows 1545-1547, columns J-K. The first is derived from Tamb in row 1540 row L, the power measured in the ambient load configuration on row 1537 column E, and the sky power in row 1540 row E. Estimates of the equivalent noise diode temperature are shown in rows 1550-1560, rows J-L. Finally, the estimates of Tsys during the track are shown in rows 1562- 1568, columns J-L, where the first and second groups bracket the bistatic radar and the third (26.68K) was the value at the end of the track. I'll plan to FAX you copies of the plots which show log(power) versus time in S-RCP. The annotations indicate the spreadsheet rows corresponding to each time interval. 26 May 2004 To: Art Freiley From: Dick Simpson Subject: Noise Calibrations at DSS 14 Table below summarizes RSR results from noise measurements made at DSS 14. For 20 May, X-RCP, S-RCP, and now S-LCP data have been analyzed; I will fill out the table one more time when the X-LCP analysis is complete. The methods described in my two previous memos were applied here. Tndu is the noise diode temperature from comparing ambient load levels with levels when the noise diode was added to the ambient load. Tndl is the noise diode temperature from comparing sky noise levels (zenith) with and without the noise diode; a nearby Top was taken to be the reference. Channel Quantity Date N Minimum Maximum Average ------- -------- ---------- -- ------- ------- ------- S-LCP Tndu 2004-04-08 4 11.30 12.20 11.60 S-RCP Top 2004-04-08 3 19.75 20.27 S-RCP Tndu 2004-04-08 2 14.67 15.74 S-RCP Tndl 2004-04-08 2 16.25 16.34 X-LCP Top 2004-04-08 2 18.48 18.49 X-LCP Tndu 2004-04-08 2 16.25 16.34 X-LCP Tndl 2004-04-08 2 17.16 17.76 X-RCP Top 2004-04-08 3 19.60 19.85 X-RCP Tndu 2004-04-08 2 20.48 22.96 X-RCP Tndl 2004-04-08 2 21.58 22.20 S-LCP Top 2004-05-13 5 23.49 24.16 23.71 S-LCP Tndu 2004-05-13 3 12.07 12.93 12.58 S-LCP Tndl 2004-05-13 3 12.08 12.36 12.20 S-RCP Top 2004-05-13 7 19.08 19.28 19.13 S-RCP Tndu 2004-05-13 4 15.60 16.16 15.81 S-RCP Tndl 2004-05-13 4 16.06 16.10 16.09 X-LCP Top 2004-05-13 10 17.16 17.37 17.28 X-LCP Tndu 2004-05-13 3 15.35 17.31 16.28 X-LCP Tndl 2004-05-13 3 17.40 17.60 17.50 X-RCP Top 2004-05-13 1 18.34 X-RCP Tndu 2004-05-13 1 23.76 X-RCP Tndl 2004-05-13 1 23.58 S-LCP Top 2004-05-20 3 23.57 23.89 23.75 S-LCP Tndu 2004-05-20 4 11.36 12.07 11.75 S-LCP Tndl 2004-05-20 2 11.82 12.04 11.93 S-RCP Top 2004-05-20 3 18.73 19.08 18.85 S-RCP Tndu 2004-05-20 5 14.83 16.49 15.99 S-RCP Tndl 2004-05-20 3 15.82 15.86 15.83 X-RCP Top 2004-05-20 5 18.38 18.67 X-RCP Tndu 2004-05-20 2 22.60 23.05 X-RCP Tndl 2004-05-20 2 23.25 23.37 Although there are some variations, the results from 13 and 20 May continue to look consistent; the biggest difference is in the noise diode temperature on S-LCP (added today). I'll attach the S-LCP spreadsheet to this message and will FAX the plots of log(power) versus time. 17 June 2004 To: Art Freiley From: Dick Simpson Subject: Noise Calibrations at DSS 14 Table below summarizes RSR results from noise measurements made at DSS 14. For 20 May, X-RCP, S-RCP, S-LCP, and now X-LCP data have been analyzed. The last has been delayed by the usual many interruptions that seem to have become part of normal life. The methods described in my previous memos were applied here. Tndu is the noise diode temperature from comparing ambient load levels with levels when the noise diode was added to the ambient load. Tndl is the noise diode temperature from comparing sky noise levels (zenith) with and without the noise diode; a nearby Top was taken to be the reference. Channel Quantity Date N Minimum Maximum Average ------- -------- ---------- -- ------- ------- ------- S-LCP Tndu 2004-04-08 4 11.30 12.20 11.60 S-RCP Top 2004-04-08 3 19.75 20.27 S-RCP Tndu 2004-04-08 2 14.67 15.74 S-RCP Tndl 2004-04-08 2 16.25 16.34 X-LCP Top 2004-04-08 2 18.48 18.49 X-LCP Tndu 2004-04-08 2 16.25 16.34 X-LCP Tndl 2004-04-08 2 17.16 17.76 X-RCP Top 2004-04-08 3 19.60 19.85 X-RCP Tndu 2004-04-08 2 20.48 22.96 X-RCP Tndl 2004-04-08 2 21.58 22.20 S-LCP Top 2004-05-13 5 23.49 24.16 23.71 S-LCP Tndu 2004-05-13 3 12.07 12.93 12.58 S-LCP Tndl 2004-05-13 3 12.08 12.36 12.20 S-RCP Top 2004-05-13 7 19.08 19.28 19.13 S-RCP Tndu 2004-05-13 4 15.60 16.16 15.81 S-RCP Tndl 2004-05-13 4 16.06 16.10 16.09 X-LCP Top 2004-05-13 10 17.16 17.37 17.28 X-LCP Tndu 2004-05-13 3 15.35 17.31 16.28 X-LCP Tndl 2004-05-13 3 17.40 17.60 17.50 X-RCP Top 2004-05-13 1 18.34 X-RCP Tndu 2004-05-13 1 23.76 X-RCP Tndl 2004-05-13 1 23.58 S-LCP Top 2004-05-20 3 23.57 23.89 23.75 S-LCP Tndu 2004-05-20 4 11.36 12.07 11.75 S-LCP Tndl 2004-05-20 2 11.82 12.04 11.93 S-RCP Top 2004-05-20 3 18.73 19.08 18.85 S-RCP Tndu 2004-05-20 5 14.83 16.49 15.99 S-RCP Tndl 2004-05-20 3 15.82 15.86 15.83 X-LCP Top 2004-05-20 4 17.38 17.57 17.48 X-LCP Tndu 2004-05-20 3 15.91 18.87 17.24 X-LCP Tndl 2004-05-20 3 17.12 17.73 17.42 X-RCP Top 2004-05-20 5 18.38 18.67 18.49 X-RCP Tndu 2004-05-20 2 22.60 23.05 22.83 X-RCP Tndl 2004-05-20 2 23.25 23.37 23.31 Although there are some variations, the results from 13 and 20 May continue to look consistent; the biggest difference is in the noise diode temperature on S-LCP. There seems to be a lot of scatter in the Tndu values from both 2004-05- 13 and 2004-05-20. The average Tndu is 1.22K lower than the average Tndl on 2004-05-13; but the average Tndl on 2004-05-13 and both averages on 2004-05-20 look good. I'll attach the X-LCP spreadsheet to this message and will FAX the plots of log(power) versus time. You may actually receive the FAX first because our e-mail server is down this morning. I have heard nothing from the PI about scheduling more observations. The MARSIS antenna deployment on the spacecraft has been postponed again. But the spacecraft will be at solar conjunction in another three months, so science incentive is minimal. I think, however, that we have demonstrated that accurate power measurements can be achieved on four channels simultaneously and look forward to putting the new procedures into practice. Thanks again for your help.