From GHewitt@jftl.jpl.nasa.gov Wed Oct 26 15:34:01 2005 Return-Path: Received: from jftl.jpl.nasa.gov (jftl.jpl.nasa.gov [128.149.207.22]) by magellan.stanford.edu (8.11.7p1+Sun/8.11.7) with SMTP id j9QMXxr29927 for ; Wed, 26 Oct 2005 15:33:59 -0700 (PDT) Received: from jftl.jpl.nasa.gov (Not Verified[128.149.207.21]) by jftl.jpl.nasa.gov with MailMarshal (v5,0,3,100) id ; Wed, 26 Oct 2005 15:35:04 -0700 Received: by jftl-mm.jpl.nasa.gov with Internet Mail Service (5.5.2657.72) id ; Wed, 26 Oct 2005 15:33:46 -0700 Message-ID: <12373B687CF8324F843BE0CA103AA6F402EAFCA4@jftl-mm.jpl.nasa.gov> From: "Hewitt, Greg" To: DSN-NOCC , "Asmar, Sami W" , "Goltz, Gene L" , DSN-PREDICTS , DSN-RMDCT , "'John.Reynolds@esa.int'" , "Kahan, Daniel S" , DSNO&M-DSOT , "'Dick Simpson 650-723-3525'" , MDSCC-Operations Cc: "Holmes, Dwight P" , "Thompson, Thomas W" , "Angold, Nigel G" , DSN-MPSETD , "'Gary.Whitehead-esa.int'" , "'Alan.Moorhouse@esa.int'" , "Wallick, Jack" , "Landon, Arthur J" , "Berman, Allen L" , "Hodder, James A" , "Beyer, Patrick E" , "Williams, Raymond C" , "Medina, Margaret" , "Berner, Jeff B" , "Guerrero, Anamaria P" , "Buck, Robert D" , "Klose, J C" , "Recce, David J" , "Marina, Miguel" , "Hodgin, Wendy K" , "Hodder, James A" , "Eaton, Curtis A" , "Davis, Esker B" , "Kurtik, Susan C" , "'Daniel S Kahan'" Subject: Briefing Message for MEX Bi-Static Radar support on DOY 303 with DSS-63 Date: Wed, 26 Oct 2005 15:33:32 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2657.72) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C5DA7D.47D344D0" Content-Length: 273559 Status: RO This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C5DA7D.47D344D0 Content-Type: text/plain Mars Express Briefing Message Level-3 DSS-63 Bi-Static Radar Experiment Support Prepared by: G Hewitt / MEX NOPE / MPSETD Origination Date: DOY 299 / 22:30 UTC Revision: Original DSS-63 DOY 303 / 2010 UTC ROUTING: JFTL / JJPL / LRID FROM: MPSETD G Hewitt SUBJECT: DSS-63 Mars Express Bi-Static Radar Support NOP: 871-049-041, REV.C SCHEDULE: Refer to DSN 7-Day Schedule for actual support times. LEVEL / TYPE: Level 3 Bi-Static Radar DOY Start BOT EOT End Facility User Activity Pass --- ----- ---- ---- ---- -------- ---- ----------------- ---- 303 2010 2310 0210 0310 DSS-63 MEX T/P BI STATIC R/S 0883 1. OVERVIEW: Bi Static Radar (BSR) experiment employs the MEX spacecraft's transmitter and a DSN 70-m antenna to receive weak S-band and X-band dual polarized RF signals and Radio Science Receivers (RSRs) to simultaneously receive and record these four signals. At a predetermined time during the pass, the spacecraft slews toward Mars so that its transmitted S-band and X-band RCP signals illuminate the planet's surface. As these RCP signals bounce off the surface, part of the signals change polarization to Left Circular Polarization (LCP) effectively creating four signals; 1) S-band RCP, 2) S- band LCP, 3) X-band RCP and 4) X-band LCP. DSN Mars Express Bi-Static Radar (BSR) calibration procedures are performed in three parts: 1) Pre-calibration, 2) Mini- calibration and 3) Post- calibration. Section-8 details the pre-calibration procedures, section-9 details mini-calibration procedures, and section-10 details post calibration procedures. 2. SUPPORT DOCUMENTATION: a. Mars Express NOP 871-049-041, Rev. A b. This briefing message c. Bi-Static Radar SOE (see attachment) supersedes DSN SOE. Radio Science shall provide start/stop times of BSR mini-pre-calibrations near real-time. 3. SUPPORT REQUIREMENTS: NOTE: Do not use Time Stacked Directives. We have experienced problems with certain time stacked directives slow to execute causing the next directive in the queue to be rejected. Consequently, this leads to configuration errors and the need to repeat steps. a. DOWNLINK SUPPORT ONLY b. DTTS (DOWNLINK TRACKING AND TELEMETRY) RECEIVERS: * One DTT shall be configured with table 7041HRX to support X-band, and to control the 12.5k noise diode on/off at predetermined times during pre-pass calibrations, real-time BSR activities and post calibrations activities. * A second DTT shall be configured with table 7041HRXS to support S-band carrier only and to control the 12.5 k noise diode on/off at predetermined times during pre-pass calibrations, real-time BSR activities and post calibrations activities. c. UPLINK: * There are NO uplink requirements d. COMMAND: * There are NO command requirements e. RADIO SCIENCE RECEIVERS (RSR): NOTE: For remote operations the FSPR MUST NOT be assigned to the DSS link. The RSRs are controlled and configured remotely by the Radio Science group located at JPL. The RSR operator will configure four radio science receivers to simultaneously receive and record S-band and X-band RCP and LCP polarized signals. The RSR equipment requires both S-band and X-band 1-way and 2-way downlink predicts. The actual RSR resources configured for support will depend on availability. * R1B IFS 63_S_RCP * R2A IFS 63_S_LCP * R1A IFS 63_X_RCP * R2B IFS 63_X_LCP 4. NOCT: Transmit X-band up/down, and X-up/S-band down predicts to the station 5. GCF: Voice: DSS /AMMOS/MEX MOC/ RS 6. DSOT There is NO SLE telemetry return link services required 7. SPACECRAFT CONFIGURATION: The spacecraft shall be reconfigured for X-band and S-band downlink carrier only in accordance with the BSR SOE (see attachment). 8. PRE-CALIBRATION PROCEDURES AND CONFIGURATION The times shown below in step-1 through step-18 are to illustrate event chronology and event duration: a. Pre-calibration requires configuring the 70m-antenna microwave subsystem so that each receiving downlink channel (S-RCP, S-LCP, X-RCP, X-LCP) can be cycled in sequence through the four configurations listed below. The antenna must be pointed to zenith for pre-calibration. 1. Receiving channel into ambient load with noise diode off 2. Receiving channel into ambient load with noise diode on 3. Receiving channel into sky (zenith) with noise diode on 4. Receiving channel into sky (zenith) with noise diode off NOTE: DTT01 is used for X-band and DTT02 is used for S-band, but any available DTT resource can be used. b. Link controller perform the procedures in step 1 and advise radio science when completed; wait at this point until directed by radio science to proceed to step 2. Step-01 00:00:00 US63 MOD 102 A Confirm dichroic reflector in place US63 CNF XRA1O1 X-RCP (LNA-1) to Sky US63 CNF XLA2O2 X-LCP (LNA-2) to Sky US63 CNF SLLA2C2O2 S-LCP (LNA-2) low noise to sky US63 CNF SRDA1C1O1 S-RCP (LNA-1) via diplexer to sky AP SCAN OFF CONSCAN Off AP SRC TRK Sub-reflector in Tracking Mode c. NOPE use the connection log display to verify DSS-63's microwave switches are configured in accordance with step-01 d. Radio science operator set each RSR attenuator using the AUTO feature. After checking for proper signal levels (about -10.0 dB ADC amplitude on each RSR), direct the link controller to proceed to step 2. Step-02 00:04:00 US63 CNF XA1A2O2 LNA-2 to ambient load-1 (X-LCP) US63 CNF XA1A1O1 LNA-1 to ambient load-1 (X-RCP) Step-03 00:06:00 US63 CNF SA2A2C2O2 LNA-2 to ambient load-2 (S-LCP) Step-04 00:08:00 US63 CNF SA1A1C1O1 LNA-1 to ambient load-1 (S-RCP) e. *Link controller and radio science operator after completing steps 2 through 4, perform the following procedures, (1) through (5): 1. Link Controller report ambient load temperatures (S1, S2, and X1) from the PRFREA display and report current weather conditions, (temperature, humidity, and sky conditions) to the Radio Science operator. 2. Radio Science operator set each RSR attenuator using AUTO feature 3. RSR operator run radio science recorders 4. RSR operator report to Link Controller when radio science recorders are recording 5. Link controller execute the following procedures at 5 min intervals and report the completion of each step to the RSR operator: Step-05 00:10:00 DC01 DISC DC01 CONN DSS63XO1 Configure DTT 01 to X-RCP DC01 SET SNT NDS=12.5 DC01 SET SNT MFQ=ON DC02 DISC DC02 CONN DSS63SO1 Configure DTT 02 to S-RCP DC02 SET SNT NDS=12.5 DC02 SET SNT MFQ=ON Step-06 00:15:00 DC01 SNT E Enable X-RCP noise diode Step-07 00:20:00 US63 CNF XRA1O1 X-RCP to sky US63 CNF XLA2O2 X-LCP to sky Step-08 00:25:00 DC01 SNT D Disable X-RCP noise diode DC01 DISC Reconfigure DTT 01 for X-LCP DC01 CONN DSS63XO2 DC01 SET SNT NDS=12.5 DC01 SET SNT MFQ=ON Step-09 00:30:00 DC01 SNT E Enable X-LCP noise diode Confirm noise diode selection is 12.5 Step-10 00:35:00 US63 CNF XA1A1O1 X-RCP (LNA-1) to ambient load US63 CNF XA1A2O2 X-LCP (LNA-2) to ambient load 00:36:00 Link controller report ambient load temp (S1, S2, X1) from the PRFREA display to the RS operator. Step-11 00:40:00 DC01 SNT D Disable X-LCP noise diode Step-12 00:45:00 US63 CNF XRA1O1 X-RCP (LNA-1) to sky US63 CNF XLA2O2 X-LCP (LNA-2) to sky Step-13 00:50:00 DC02 SNT E Enable S-RCP noise diode DC01 DISC Reconfigure DTT 01 for X-RCP DC01 CONN DSS63XO1 DC01 SET SNT NDS=12.5 DC01 SET SNT MFQ=ON Step-14 00:55:00 US63 CNF SRDA1C1O1 S-RCP (LNA-1) via diplexer to sky Step-15 01:00:00 DC02 SNT D Disable S-RCP noise diode DC02 DISC Reconfigure DTT 02 for S-LCP DC02 CONN DSS63SO2 DC02 SET SNT NDS=12.5 DC02 SET SNT MFQ=ON Confirm noise diode is 12.5 Step-16 01:05:00 DC02 SNT E Enable S-LCP noise diode Step-17 01:10:00 US63 CNF SLLA2C2O2 S-LCP (LNA-2) to sky Step-18 01:15:00 DC02 SNT D Disable S-LCP noise diode DC02 DISC Reconfigure DTT 02 for S-RCP DC02 CONN DSS63SO1 DC02 SET SNT NDS=12.5 DC02 SET SNT MFQ=ON Link controller report ambient load physical temperatures (S1,S2, and X1) from PRFREA display to the RS operator. 01:20:00 End of BSR noise measurement pre-cal procedure 9. MINI CALIBRATION PROCEDURES AND TIMELINE a. Link controller, shortly after MEX begins its slew and before the BSR surface observations begin, confirm DTT 01 and DTT 02 configurations. b. Link controller confirm DTT 01 is configured for X-RCP; if not, perform the following operator directives: 1. DC01 DISC 2. DC01 CONN DSS63XO1 3. DC01 SET SNT NDS=12.5 4. DC01 SET SNT MFQ=ON c. Link controller confirm DTT 02 is configured for S-RCP; if not, perform the following operator directives: 1. DC02 DISC 2. DC02 CONN DSS63SO1 3. DC02 SET SNT NDS=12.5 4. DC02 SET SNT MFQ=ON d. RSR operator ensure all radio science Recorders are recording. e. Link controller, at direction from RSR operator, begin the BSR mini-noise calibration procedures. The times shown are to illustrate event chronology and event duration: Step-01 00:00:00 DC01 SNT E Enable X-RCP noise diode Confirm noise diode value is 12.5 Step-02 00:03:00 DC01 SNT D Disable X-RCP noise diode DC02 SNT E Enable S-RCP noise diode DC01 DISC Reconfigure DTT 01 for X-LCP DC01 CONN DSS63XO2 US63 D XMAP Verify configuration DC01 SET SNT NDS=12.5 DC01 SET SNT MFQ=ON Step-03 00:06:00 DC02 SNT D Disable S-RCP noise diode DC01 SNT E Enable X-LCP noise diode DC02 DISC Reconfigure DTT 02 for S-LCP DC02 CONN DSS63SO2 US63 D SMAP Verify configuration DC02 SET SNT NDS=12.5 DC02 SET SNT MFQ=ON Step-04 00:09:00 DC01 SNT D Disable X-LCP noise diode DC02 SNT E Enable S-LCP noise diode DC01 DISC Reconfigure DTT 01 for X-RCP DC01 CONN DSS63XO1 US63 D XMAP Verify configuration DC01 SET SNT NDS=12.5 DC02 SET SNT MFQ=ON Step-05 00:12:00 DC02 SNT D Disable S-LCP noise diode DC02 DISC Reconfigure DTT 02 for S-RCP DC02 CONN DSS63SO1 US63 D SMAP Verify configuration DC02 SET SNT NDS=12.5 DC02 SET SNT MFQ=ON 00:15:00 End of BSR Mini-Noise Cal. Step-06 Link controller, repeat the BSR mini-noise calibration procedures steps 01-05 after MEX has completed its surface observations and before it returns to Earth point. The start time will be provided by radio science. 10. POST CALIBRATION PROCEDURES AND TIMELINE: Step-01 00:00:00 Link controller move antenna to zenith US63 CNF SA1A1C1O1 S-RCP (LNA-1) to ambient load US63 CNF SA2A2C2O2 S-LCP (LNA-2) to ambient load US63 CNF XA1A1O1 X-RCP (LNA-1) to ambient load US63 CNF XA1A2O2 X-LCP (LNA-2) to ambient load DC01 DISC Confirm DTT 01 for X-RCP DC01 CONN DSS63XO1 DC01 SET SNT NDS=12.5 DC01 SET SNT MFQ=ON DC02 DISC Confirm DTT 02 for S-RCP DC02 CONN DSS63SO1 DC02 SET SNT NDS=12.5 DC02 SET SNT MFQ=ON a. Link controller advise the RSR operator when the antenna is at zenith and the configurations listed above have been completed. b. Link controller report physical temperatures of each ambient load (S1, S2, and X1) from the downlink PRFREA display. c. RSR operator run all radio science Recorders and record ambient loads for 3 min. At completion, advise the link controller to proceed with the following steps: Step-02 00:03:00 DC01 SNT E Enable X-RCP noise diode Step-03 00:06:00 DC01 SNT D Disable X-RCP noise diode DC02 SNT E Enable S-RCP noise diode DC01 DISC Reconfigure DTT 01 for X-LCP DC01 CONN DSS63XO2 DC01 SET SNT NDS=12.5 DC01 SET SNT MFQ=ON Step-04 00:09:00 DC02 SNT D Disable S-RCP noise diode DC01 SNT E Enable X-LCP noise diode DC02 DISC Reconfigure DTT 02 for S-LCP DC02 CONN DSS63SO2 DC02 SET SNT NDS=12.5 DC02 SET SNT MFQ=ON Step-05 00:12:00 DC01 SNT D Disable X-LCP noise Diode DC02 SNT E Enable S-LCP noise diode Step-06 00:15:00 US63 CNF SRDA1C1O1 S-RCP (LNA-1) to sky US63 CNF SLLA2C2O2 S-LCP (LNA-2) to sky US63 CNF XRA1O1 X-RCP (LNA-1) to sky US63 CNF XLA2O2 X-LCP (LNA-2) to sky Step-07 00:18:00 DC02 SNT D Disable S-LCP noise diode DC01 SNT E Enable X-LCP noise diode DC02 DISC Reconfigure DTT 02 for S-RCP DC02 CONN DSS63SO1 DC02 SET SNT NDS=12.5 DC02 SET SNT MFQ=ON Step-08 00:21:00 DC01 SNT D Disable X-LCP noise diode DC02 SNT E Enable S-RCP noise diode DC01 DISC Reconfigure DTT 01 for X-RCP DC01 CONN DSS63XO1 DC01 SET SNT NDS=12.5 DC01 SET SNT MFQ=ON Step-09 00:24:00 DC02 SNT D Disable S-RCP noise diode DC01 SNT E Enable X-RCP noise diode Step-10 00:27:00 DC01 SNT D Disable X-RCP noise diode 00:30:00 End d. Link Controller report physical temperatures of each ambient load (S1, S2, and X1) from the downlink PRFREA display and report the current weather (temperature, humidity, and sky conditions) to radio science. e. Radio Science operator stop RSRs. f. End of BSR noise post-calibration procedures. g. Link Controller proceed with normal tear-down procedures. h. Re-initialization of the DTTs is recommended. MPSETD POINTS OF CONTACT: DSN-MPSETD@jjpl.jpl.nasa.gov MPSETD OFFICE OPS WORK STATION Jose Valencia (LEAD) (626) 305-6308 (626) 305-6370 (626) 305-6368 Jesse Velasco (NOPE) (626) 305-6315 Romy Paredes (NOPE) (626) 305-6309 Greg Hewitt (NOPE (626) 305-6292 RADIO SCIENCE WORK STATION (818) 393-0666 Regards, Gregory W. Hewitt (626) 305-6292 (Office) (626) 491-0017 (Pager) (626) 305-6389 (Fax) ghewitt@jftl.jpl.nasa.gov