From jesse.velasco@dsn.nasa.gov Thu Oct 8 10:47:21 2009 Return-Path: Received: from DSNOAM-MM.jpl.nasa.gov (dsnoam-mm.jpl.nasa.gov [128.149.207.83]) by magellan.stanford.edu (8.11.7p3+Sun/8.11.7) with ESMTP id n98HlGT26679 for ; Thu, 8 Oct 2009 10:47:16 -0700 (PDT) Received: from dsnoamex1.jpl.nasa.gov (Not Verified[128.149.207.88]) by DSNOAM-MM.jpl.nasa.gov with MailMarshal (v6,4,6,5922) id ; Thu, 08 Oct 2009 10:47:14 -0700 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CA483F.5E7C2016" Subject: BRIEFING MESSAGE FOR MEX BI STATIC R/S DOY 284 DSS-14 Date: Thu, 8 Oct 2009 10:47:13 -0700 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: BRIEFING MESSAGE FOR MEX BI STATIC R/S DOY 284 DSS-14 Thread-Index: AcpIP16LS/BFtWhaRsicy9kOOFA62w= From: "Velasco, Jesse" To: "DSN-Official" , "!DL-DSN-NOCC" , "!DL-DSN-DSOT" , "!DL-DSN-SPSSPA" , , , , "GDSCC Operations," Cc: "Thompson, Thomas W" , "Angold, Nigel G" , "Landon, Arthur J" , "Hodder, James A" , "Beyer, Patrick E" , "Williams, Raymond C" , "Magallanes, Margaret R" , "Berner, Jeff B" , "Guerrero, Anamaria P" , "Marina, Miguel" , "Hodgin, Wendy K" , "Hodder, James A" , "Eaton, Curtis A" , "Davis, Esker B" , "Kurtik, Susan C" , , , , "!DL-DSN-MPSETD" , "Dick Simpson 650-723-3525" , =?iso-8859-1?Q?Martin_P=E4tzold?= Content-Length: 81193 Status: RO This is a multi-part message in MIME format. ------_=_NextPart_001_01CA483F.5E7C2016 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Mars Express (MEX) Briefing Message Level 4 Bi-Static Radar Experiment Support Prepared by: J Velasco / MEX NOPE / MPSETD Origination Date: DOY 281 / 1700 UTC Revision: Original DSS 14 DOY 284 / 1310 UTC ROUTING: JFTL / JJPL / JGTS FROM: MPSETD / J Velasco SUBJECT: Mars Express Bi-Static Radar Support NOP: 871-049-041, REV. L SCHEDULE: Refer to DSN 7-Day Schedule for actual support times. DOY Start BOT EOT End Facility User Activity 284 1310 1510 1725 1825 DSS-14 MEX T/P BISTATIC R/S LEVEL / TYPE: Level 4 / 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-8 details the pre-calibration procedures, section-9 details mini-calibration procedures, and section-10 details post calibration procedures. 2. SUPPORT DOCUMENTATION: a. This briefing message b. Bi-Static Radar 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: 1. 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. 2. 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. 4. SUPPORT PRODUCTS ANALYST: (1) Ensure the Support Data Package (SDP) is created and contains the required support products. The SDP is created five days in advance of the schedule support. a. SOE b. S and X-band DLF predicts c. PX6 predicts (2) Ensure S and X-band DLF predicts are posted to the SPS portal four days before the schedule support to meet Radio Science support requirement. (3) Ensure the SDP is transmitted to the station 24 hours before the scheduled support. 5. NOCC: OPS-CHIEF/TSS: Participate in the pre and post-pass briefing and help in trouble shooting. COMM-Chief: Configure a voice line for MEX MOC, R/S group, and supporting station. DSOT: There are no SLE telemetry return link services required. 6. SPACECRAFT CONFIGURATION: The spacecraft shall be reconfigured for X-band and S-band downlink carrier only in accordance with the SOE. 7. 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 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. 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 1 00:00:00 Confirm dichoric reflector is in place Configure X-RCP (LNA-1) to sky and output 1 Configure X-LCP (LNA-2) to sky and output 2 Configure S-LCP (LNA-2) low noise to sky and output 2 Configure S-RCP (LNA-1) via Diplexer to sky and output 1 Turn off CONSCAN Track Sub-reflector c. 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 2 00:04:00 Configure X-LCP (LNA-2) to ambient load-1 Configure X-RCP (LNA-1) to ambient load-1 Step 3 00:06:00 Configure S-LCP (LNA-2) to ambient load-2 Step 4 00:08:00 Configure S-RCP (LNA-1) to ambient load-1 d. 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 5 00:10:00 Disconnect DC01 IF Connect DC01 IF to X-RCP Select the 12.5 noise diode on DC01 Turn DC01 SNT MFQ on Disconnect DC02 IF Connect DC02 IF to S-RCP Select the 12.5 noise diode on DC02 Turn DC02 SNT MFQ on Step 6 00:15:00 Enable X-RCP (DC01) noise diode (SNT) Step 7 00:20:00 Configure X-RCP to sky and output 1 Configure X-LCP to sky and output 2 Step 8 00:25:00 Disable X-RCP (DC01) noise diode Disconnect DC01 IF Connect DC01 IF to X-LCP Select the 12.5 noise diode on DC01 Turn DC01 SNT MFQ on Step 9 00:30:00 Enable X-LCP (DC01) noise diode Confirm noise diode selected is 12.5 Step 10 00:35:00 Configure X-RCP (LNA-1) to ambient load and output 1 Configure X-LCP (LNA-2) to ambient load and output 2 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 Disable X-LCP (DC01) noise diode Step 12 00:45:00 Configure X-RCP (LNA-1) to sky and output 1 Configure X-LCP (LNA-2) to sky and output 2 Step 13 00:50:00 Enable S-RCP (DC02) noise diode Disconnect DC01 IF Connect DC01 IF to X-RCP Select the 12.5 noise diode on DC01 Turn DC01 SNT MFQ on Step 14 00:55:00 Configure S-RCP (LNA-1) to sky via the diplexer and output 1 Step 15 01:00:00 Disable S-RCP (DC02) noise diode Disconnect DC02 IF Connect DC02 IF to S-LCP Select the 12.5 noise diode on DC02 Turn DC02 SNT MFQ on Confirm noise diode is 12.5 Step 16 01:05:00 Enable S-LCP (DC02) noise diode Step 17 01:10:00 Configure S-LCP (LNA-2) to sky with output 2 Step 18 01:15:00 Disable S-LCP (DC02) noise diode Disconnect DC02 IF Connect DC02 IF to S-RCP Turn DC02 SNT MFQ on Confirm noise diode is 12.5 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 8. MINI CALIBRATION PROCEDURES AND TIMELINE NOTE: Carrier lock of X and S-band closed loop receiver (DTT) not required. 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 with noise diode 12.5 and MFQ on. c. Link controller confirm DTT 02 is configured for S-RCP with noise diode 12.5 and 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 1 00:00:00 Enable X-RCP (DC01) noise diode Confirm noise diode value is 12.5 Step 2 00:03:00 Disable X-RCP (DC01) noise diode Enable S-RCP (DC02) noise diode Disconnect DC01 IF Reconnect DC01 IF to X-LCP Verify X-band microwave configuration Select the 12.5 noise diode on DC01 Turn DC01 SNT MFQ on Step 3 00:06:00 Disable S-RCP (DC02) noise diode Enable X-LCP (DC01) noise diode Disconnect DC02 IF Reconnect DC02 IF to S-LCP Verify S-band microwave configuration Select the 12.5 noise diode on DC02 Turn DC02 SNT MFQ on Step 4 00:09:00 Disable X-LCP (DC01) noise diode Enable S-LCP (DC02) noise diode Disconnect DC01 IF Reconnect DC01 IF to X-RCP Verify X-band microwave configuration Select the 12.5 noise diode on DC01 Turn DC01 SNT MFQ on Step 5 00:12:00 Disable S-LCP (DC02) noise diode Disconnect DC02 IF Reconnect DC02 IF to S-RCP Verify S-band microwave configuration Select the 12.5 noise diode on DC02 Turn DC02 SNT MFQ on 00:15:00 End of BSR mini-noise cal Step 6 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. 9. POST CALIBRATION PROCEDURES AND TIMELINE: Step 1 00:00:00 Link controller move antenna to zenith (do not stow) Configure S-RCP (LNA-1) to ambient load-1 Configure S-LCP (LNA-2) to ambient load-2 Configure X-RCP (LNA-1) to ambient load-1 Configure X-LCP (LNA-2) to ambient load-1 Disconnect DC01 IF Connect DC01 IF to X-RCP Select the 12.5 noise diode on DC01 Turn DC01 SNT MFQ on Disconnect DC02 IF Reconnect DC02 IF to S-RCP Select the 12.5 noise diode on DC02 Turn DC02 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 2 00:03:00 Enable X-RCP (DC01) noise diode Step 3 00:06:00 Disable X-RCP (DC01) noise diode Enable S-RCP (DC02) noise diode Disconnect DC01 IF Reconnect DC01 IF to X-LCP Select the 12.5 noise diode on DC01 Turn DC01 SNT MFQ on Step 4 00:09:00 Disable S-RCP (DC02) noise diode Enable X-LCP (DC01) noise diode Disconnect DC02 IF Reconnect DC02 IF to S-LCP Select the 12.5 noise diode on DC02 Turn DC02 SNT MFQ on Step 5 00:12:00 Disable X-LCP (DC01) noise diode Enable S-LCP (DC02) noise diode Step 6 00:15:00 Configure S-RCP (LNA-1) to sky Configure S-LCP (LNA-2) to sky Configure X-RCP (LNA-1) to sky Configure X-LCP (LNA-2) to sky Step 7 00:18:00 Disable S-LCP (DC02) noise diode Enable X-LCP (DC01) noise diode Disconnect DC02 IF Reconnect DC02 IF to S-RCP Select the 12.5 noise diode on DC02 Turn DC02 SNT MFQ on Step 8 00:21:00 Disable X-LCP (DC01) noise diode Enable S-RCP (DC02) noise diode Disconnect DC01 IF Reconnect DC01 IF to X-RCP Select the 12.5 noise diode on DC01 Turn DC01 SNT MFQ on Step 9 00:24:00 Disable S-RCP (DC02) noise diode Enable X-RCP (DC01) noise diode Step 10 00:27:00 Disable X-RCP (DC01) 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: !DL-DSN-MPSETD@dsn.nasa.gov MPSETD NOPE's OFFICE CELL Scott riley (Lead) (626) 305-6284 (626) 372-0862 Jesse Velasco (626) 305-6315 Romy Paredes (626) 305-6309 Greg Hewitt (626) 305-6292 Anthony Knight (626) 305-6305 Jesse Velasco NOPE MEX/SELE/VEX/ROSE/CLUS (626) 305-6315 THE TECHNICAL DATA IN THIS DOCUMENT (OR FILE) IS CONTROLLED UNDER THE U.S. EXPORT REGULATIONS, AND MAY NOT BE RELEASED TO FOREIGN PERSONS WITHOUT A LICENSE AUTHORITY. This document has been reviewed for export control and it does NOT contain export-controlled technical data.