From JVelasco@jftl.jpl.nasa.gov Fri Aug 4 13:57:56 2006 Return-Path: Received: from jftl.jpl.nasa.gov (jftl.jpl.nasa.gov [128.149.207.22]) by magellan.stanford.edu (8.11.7p2+Sun/8.11.7) with SMTP id k74KvtF17310 for ; Fri, 4 Aug 2006 13:57:55 -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 ; Fri, 04 Aug 2006 14:00:01 -0700 Received: by jftl-mm.jpl.nasa.gov with Internet Mail Service (5.5.2657.72) id ; Fri, 4 Aug 2006 13:57:46 -0700 Message-ID: <88AB5DE488E2F84493F94DF423EE26D029DE6A@jftl-mm.jpl.nasa.gov> From: "Velasco, Jesse" 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'" , CDSCC 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" Subject: BRIEFING MESSAGE FOR MEX BI STATIC RADAR SUPPORT DOY 222 DSS-43 Date: Fri, 4 Aug 2006 13:57:18 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2657.72) Content-Type: multipart/mixed; boundary="----_=_NextPart_000_01C6B807.8F4081C0" Content-Length: 336975 Status: RO Mars Express (MEX) Briefing Message Level 3 DSS-43 BiStatic Radar Experiment Prepared by: J Velasco / MEX / DSN-MPSETD Origination Date: DOY 214/2000 UTC Revision : Original DSS-43 DOY 222/0330 UTC ROUTING: JFTL / JJPL / ANBE FROM: JFTL / MPSETD / J Velasco SUBJECT: Mars Express Bi-Static Radar Support NOP: 871-049-041, REV.F SCHEDULE: Refer to DSN 7-Day Schedule for actual support times. DOY BOA BOT EOT EOA DSS USER ACTIVITY PASS 222 0330 0530 0825 0925 DSS-43 MEX T/P BISTATIC R/SE 1167 LEVEL / TYPE: Level 3 / Bi-Static Radar support 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 Bistatic Radar (BSR) calibration procedures are performed in three parts: 1) Pre-calibration, 2) Mini- calibration and 3) Post-calibration. Section-5 details the pre-calibration procedures, section-6 details mini-calibration procedures, and section-7 details post calibration procedures. 2. SUPPORT DOCUMENTATION: a. This briefing message b. 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: DOWNLINK: 1) Configure one DTT with table 7041HRX to support X-band operation and to control the 12.5k noise diode. 2) Configure a second DTT with table 7041HRXS for S-band carrier only and to control the 12.5k noise diode. UPLINK: No uplink requirment COMMAND: No commanding required RADIO SCIENCE: a. 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. b. 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. NOCT: Ops-Chief / TSS: Transmit X-band up/down, and X-up/S-band down predicts to the station. Comm-Chief: Configure a voice line: DSS /AMMOS / MEX MOC/ RS DSOT: No SLE telemetry return link services required 4. SPACECRAFT CONFIGURATION: The spacecraft shall be reconfigured for X-band and S-band downlink carrier only in accordance with the BSR SOE (see attachment). 5. PRE-CALIBRATION PROCEDURES AND CONFIGURATION a. Pre-calibration procedures are detailed below in step-1 through step-18. The times shown are to illustrate event chronology and event duration: b. 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 sky (zenith) with noise diode off 2. Receiving channel into sky (zenith) with noise diode on 3. Receiving channel into ambient load with noise diode off 4. Receiving channel into ambient load with noise diode on NOTE 1: In this briefing message DTT01 is used for X-band and DTT02 is used for S-band, but any available DTT resource can be used. NOTE 2: Do not time stack Operator Directives (ODs). Pass experience has shown that time stacking may result in rejection of ODs or delayed OD execution. c. 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 US43 MOD 102 A Confirm dichroic reflector in place US43 CNF XRA1O1 X-RCP (LNA-1) to Sky US43 CNF XLA2O2 X-LCP (LNA-2) to Sky US43 CNF SLLA2C2O2 S-LCP (LNA-2) low noise to sky US43 CNF SRDA1C1O1 S-RCP (LNA-1) via diplexer to sky AP SCAN OFF CONSCAN Off AP TRK SR Sub-reflector in Tracking Mode 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 US43 CNF XA1A2O2 LNA-2 to ambient load-1 (X-LCP) US43 CNF XA1A1O1 LNA-1 to ambient load-1 (X-RCP) Step-03 00:06:00 US43 CNF SA2A2C2O2 LNA-2 to ambient load-2 (S-LCP) Step-04 00:08:00 US43 CNF SA1A1C1O1 LNA-1 to ambient load-1 (S-RCP) 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 DSS43XO1 Configure DTT 01 to X-RCP DC01 SET SNT NDS=12.5 DC01 SET SNT MFQ=ON DC02 DISC DC02 CONN DSS43SO1 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 US43 CNF XRA1O1 X-RCP to sky US43 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 DSS43XO2 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 US43 CNF XA1A1O1 X-RCP (LNA-1) to ambient load US43 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 US43 CNF XRA1O1 X-RCP (LNA-1) to sky US43 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 DSS43XO1 DC01 SET SNT NDS=12.5 DC01 SET SNT MFQ=ON Step-14 00:55:00 US43 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 DSS43SO2 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 US43 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 DSS43SO1 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 6. 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 DSS43XO1 (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 DSS43SO1 (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 DSS43XO2 US43 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 DSS43SO2 US43 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 DSS43XO1 US43 D XMAP Verify configuration DC01 SET SNT NDS=12.5 DC01 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 DSS43SO1 US43 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 1-5 after MEX has completed its surface observations and before it returns to Earth point. The start time will be provided by radio science. 7. POST CALIBRATION PROCEDURES AND TIMELINE: Step-01 00:00:00 Link controller move antenna to zenith US43 CNF SA1A1C1O1 S-RCP (LNA-1) to ambient load US43 CNF SA2A2C2O2 S-LCP (LNA-2) to ambient load US43 CNF XA1A1O1 X-RCP (LNA-1) to ambient load US43 CNF XA1A2O2 X-LCP (LNA-2) to ambient load DC01 DISC Confirm DTT 01 for X-RCP DC01 CONN DSS43XO1 DC01 SET SNT NDS=12.5 DC01 SET SNT MFQ=ON DC02 DISC Confirm DTT 02 for S-RCP DC02 CONN DSS43SO1 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 DSS43XO2 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 DSS43SO2 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 US43 CNF SRDA1C1O1 S-RCP (LNA-1) to sky US43 CNF SLLA2C2O2 S-LCP (LNA-2) to sky US43 CNF XRA1O1 X-RCP (LNA-1) to sky US43 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 DSS43SO1 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 DSS43XO1 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 a. 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. b. Radio Science operator stop RSRs. c. End of BSR noise post-calibration procedures. d. Link Controller proceed with normal tear-down procedures. e. 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