From JVelasco@jftl.jpl.nasa.gov Fri Oct 17 11:38:46 2003 Received: from jftl-mm.jpl.nasa.gov (jftl.jpl.nasa.gov [128.149.117.25]) by magellan.stanford.edu (8.11.6/8.11.6) with ESMTP id h9HIcjx05613 for ; Fri, 17 Oct 2003 11:38:45 -0700 (PDT) Received: from jftl.jpl.nasa.gov (not verified[128.149.117.23]) by jftl- mm.jpl.nasa.gov with MailMarshal (4,2,5,0) id ; Fri, 17 Oct 2003 11:42:13 -0700 Received: by jftl-mm.jpl.nasa.gov with Internet Mail Service (5.5.2656.59) id ; Fri, 17 Oct 2003 11:38:13 -0700 Message-ID: <12373B687CF8324F843BE0CA103AA6F4019510E4@jftl-mm.jpl.nasa.gov> From: "Velasco, Jesse" To: "Velasco, Jesse" , "Asmar, Sami W" , "Anabtawi, Aseel" , "Abbate, Salvatore F" , "Angold, Nigel G" , DSN-MPSETD , "'Dick Simpson 723-3525'" , "Holmes, Dwight P" , CDSCC-Operations , "GDSCC Operations," , CDSCC , DSN-NOCC Cc: "'Marco Lanucara (E-mail)'" , "Hewett, Susan" , "Nguyen, Peter H" , DSN-PREDICTS , "Thompson, Thomas W" Subject: Corrected copy Briefing Message for Mars Express Radio Science Test Supports DOY 291 Date: Fri, 17 Oct 2003 11:38:08 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2656.59) Content-Type: text/plain; charset="iso-8859-1" Content-Length: 9001 ROUTING: JFTL / JJPL / JOCC / ANBE / JGTS FROM: MPSET(D)/ J. Velasco SUBJECT: Mars Express (MEX) Radio Science Test Supports SCHEDULE: Refer to DSN 7-Day Schedule for actual support times. 291 0640 0810 1630 1700 DSS-43 MEX R/S BI-STATIC 0139 N621 291 2245 0015 0915 0945 DSS-24 MEX R/S OCC 0139 N70T 1. PURPOSE: To exercise spacecraft and station configurations for activities such as; Bistatic Radar measurements, and occultations. 2. OBJECTIVE: a. Demonstrate that the DSN can support the various configurations required for successful Bistatic Radar measurement activities. b. Exercise spacecraft configuration to be used for planned radio science experiments. 3. SUPPORT DOCUMENTATION a. NOP 871-049-041 b. This briefing message c. Sequence of Events 4. SUPPORT REQUIREMENTS: General a. The Radio Science Systems Group will remotely control the Radio Science Receiver(RSR)for all scheduled supports. b. X-Band and S-Band ranging will be performed. c. The spacecraft will be transmitting XRCP and/or SRCP. d. Nominal predictions for X/X, S/S X/S X/X are to be generated. e. X-Band Telemetry will be prime for all supports. f. Enable prime data stream to line as required. g. The NOPE will be on duty in the ROSA for these activities. h. All stations are required to acquire S-Band carrier lock only. S-Band Telemetry will not be present on the downlink. i. Station is required to configure for support in accordance with Table-2. j. Configure both receiver(s) with the configuration table listed below in table-2. Bistatic Radar Measurement Test Support Requirements. (DSS-43 Only) a. 70-Meter antenna support is required. b. Closed-loop and Open-Loop receivers are required. c. For X-Band, the fixed channel HEMT are configured LCP/RCP at all times. d. For S-Band, the HEMT in MOD-III will be configured for low noise path. e. The cone TWM will be configured for the diplex path. f. Record Noise Diode on and off times and report to Radio Science Group. g. Configure Receivers for (1) XRCP (2) SRCP Closed-Loop during real-time support. h. Perform Y-Factor measurements for all receiver channels and perform noise diode calibrations during the Setup periods. During set up perform Y-factor measurement with the two receivers configured for XLCP and SLCP. Then perform the Y-factor measurement again with the receivers configured for XRCP and SLCP. The receivers will be configured for XRCP and SRCP during real-time supports. No noise cal for tear down. i. Configure receiver with the configuration table listed below in table-2. Configure-one receiver for XRCP and the other receiver for SRCP. j. Turn on/off all the noise diodes at the same time and switch in/out the ambient loads simultaneously whenever the the RSR is running. Provide a listing of the on/off/in/out times after each set of measurements is completed. k. Provide a physical temperature of the ambient loads. RADIOMETRIC Table-1. DSS-43 Microwave Configuration S-Band S-Band LNA Low Noise Path HEMT Diplex Mode TWM X-Band X-Band LNA XTR Cone HEMT XTR Cone HEMT Table-2. Spacecraft/Receiver Configuration DOY DSS BAND RCV CONFIG TABLE --- --- --------------------- ---------------- 291 43 X-Band Up/X-Band Down 7041hrx.cfg S-Band Down 7041hrxs.cfg 291 24 X-Band Up/X-Band Down 3441hrx.cfg S-Band Down 3441hrsx.cfg Table-3. Ranging Configuration DOY DSS RANGING CONFIG MOD INDEX (RAD) X-BAND S-BAND --- --- ------------------ ------------------- 291 43 X-Up/Down + S-Down (X = 0.2) (S= 0.1) 291 24 X-Up/Down + S-Down (X = 0.2) (S = 0.1) TELEMETRY a. The telemetry system should be configured in accordance with (IAW) section 7 of the MEX NOP. b. The telemetry data rate will be 209715.2sps. c. The telemetry Mod index will be 1.25 rad. d. Enable the out put from the telemetry channel that is configured for the D/L path with the polarization X-Band RCP. e. X-Band will be prime for all supports. f. There is no telemetry modulation on the S-band downlink. (Carrier Only) COMMAND a. The command system should be configured IAW section 8 of the MEX NOP. b. The command data rate will be 2000bps. c. The command index : S-Band =0.8 rad, X-Band=1.0 rad. MONITOR & CONTROL N/A RADIO SCIENCE Noise Diode Calibration Procedure. Setup: 1) Antenna at zenith 2) Verify RSR recording (Remotely controlled by RSR Team) 3) Antenna on Cold sky (5 Min) 4) Antenna/UWV cold sky and 12K Noise Diode ( 5 Min ). 5) Antenna/UWV Ambient Load (5 Min). 6) Perform Y-factor measurements for all channels. Perform Y-Factor measurements for all receiver channels and perform noise diode calibrations during the Setup. During set up perform Y-factor measurement with the two receivers configured for XLCP and SLCP. Then perform the Y-factor measurement again with the receivers configured for XRCP and SRCP. THE Y-FACTOR MEASUREMENTS NEED TO BE PERFORMED TO ACHIEVE THE OBJECTIVES OF THE R/S TEST. Experiment: The NMC Link controller will need to manually turn the 12K Noise Diode on and off during the support on DOY 291 at the following times: START STOP ------------ ------------ -------------------------------- 291/10:00:00 291/10:05:00 Turn on X-RCP 12 deg noise diode 291/10:00:00 291/10:05:00 Turn on S-RCP 12 deg noise diode 291/10:00:00 291/10:05:00 Turn on X-LCP 12 deg noise diode 291/10:00:00 291/10:05:00 Turn on S-LCP 12 deg noise diode 291/11:00:00 291/11:05:00 Turn on X-RCP 12 deg noise diode 291/11:00:00 291/11:05:00 Turn on S-RCP 12 deg noise diode 291/11:00:00 291/11:05:00 Turn on X-LCP 12 deg noise diode 291/11:00:00 291/11:05:00 Turn on S-LCP 12 deg noise diode 291/12:00:00 291/12:05:00 Turn on X-RCP 12 deg noise diode 291/12:00:00 291/12:05:00 Turn on S-RCP 12 deg noise diode 291/12:00:00 291/12:05:00 Turn on X-LCP 12 deg noise diode 291/12:00:00 291/12:05:00 Turn on S-LCP 12 deg noise diode Teardown: 1) Antenna at zenith 2) Antenna on Cold sky (2 Min) 3) Antenna/UWV cold sky and 12K Noise Diode ( 2 Min ). 4) Antenna/UWV Ambient Load (2Min). 5) Perform y-factor measurements for all channels. XRCP/XLCP and SRCP/SLCP 6) RSR recording stopped by RSR Team . Note: 1) Record of Ambient Load Temp Date . 2) Record of 12K Noise Diode on / off times. 3) Record of Ambient Load switching times . 4) Do not perform noise cal for tear down. GCF a. Voice: DSS / JPL / ROSA MOPS/AMMOS/MEMOC b. Data: DSS / JPL /AMMOS/ESA/MEMOC NOCT Prior to each scheduled support, NOCT personnel are requested to transmit the following predictions to supporting station as depicted below. Note: reference table-2 DOY DSS PREDICTS SUPPORT CONFIGURATION PASS NO. --- --- ------------ --------------------- -------- 291 43 MEX_031010_X x-up x-down 0139 MEX_031010XS x-up s-down 291 24 MEX_031010_X x-up x-down 0139 MEX_031010XS x-up s-down 5. DELIVERABLES: a. The Radio Science Systems Group will record data at the RSR beginning at setup through the end of teardown activities. 6. MISCELLANEOUS: N/A 7. SEQUENCE OF EVENTS: 8. POINTS OF CONTACT: DSN-MPSETD@jjpl.jpl.nasa.gov): PSD Team Office Pager Rick nevarez (MSE) 626-584-4440 Jose Valencia(Lead NOPE) 626-584-4554 Jesse Velasco(NOPE) 626-584-4448 Khanh Ly (NOPE) 626-584-4690 Romy Paredes(NOPE) 626-584-4635 Remote Operations Support Area: 626-584-4412 626-584-4411 Radio Science Operations Room: 818-393-0666 Regards, Jesse Velasco