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PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 OBJECT = DATA_SET DATA_SET_ID = "GO-SUN-RSS-1-ODR-V1.0" OBJECT = DATA_SET_INFORMATION DATA_SET_NAME = "GALILEO RAW ODR SOLAR CONJUNCTION DATA V1.0" DATA_SET_COLLECTION_MEMBER_FLG = "N" DATA_OBJECT_TYPE = TABLE START_TIME = 1991-12-20T17:15:04Z STOP_TIME = "UNK" DATA_SET_RELEASE_DATE = 1997-04-23 PRODUCER_FULL_NAME = "RADIO SCIENCE SUPPORT TEAM" DETAILED_CATALOG_FLAG = "N" DATA_SET_DESC = " Data Set Overview ================= This data set contains raw open-loop Radio Science data from the Galileo (GLL) Solar Wind Scintillation Experiments (SWSE). There are five Solar Conjunction experiments conducted over the following time periods: SWSE 1: December 20, 1991, to January 26, 1992 SWSE 2: October 6, 1993, to December 2, 1993 SWSE 3: November 7, 1994, to December 27,1994 SWSE 4: November 24, 1995, to January 13, 1996 SWSE 5: December 26, 1996, to February 13,1997 The data set includes Original Data Records (ODRs) and the supporting information necessary to reduce the data. Other data sets contain radio tracking data for the same periods. The experiment is described in detail in DESCRIPT.TXT in the DOCUMENT directory. Another explanation of the experiment, as well as the ground equipment, spacecraft, and operations procedures, may be found in the Radio Science Handbook. This handbook is also in the DOCUMENT directory. Parameters ========== Open loop data records (ODRs) contain 8-bit samples of receiver output. Each block of 400 data samples is accompanied by a 166 byte header. The ODR is described by a Software Interface Specification (SIS), included as RS11_10A.TXT or RSC11_11.TXT in the DOCUMENT directory. Data ==== Original Data Records (ODRs) were the primary data type for this raw data archive. ODRs were generated at stations of the NASA Deep Space Network (DSN) and were distributed on 6250 bpi tape. Those tapes have been copied to disk files, defined as PDS TABLE Objects, and archived on these CD-WO volumes. ODRs are stored on CD-WO volumes in chronological order; ancillary data files (to support analysis) accompany ODRs in the CALIB and DOCUMENT directories. A nominal ODR contains 55000 records, each record having 166 bytes of header data and 400 bytes of 8-bit sample data. Each of four receiver channels (X-RCP, S-RCP, X-LCP, and S-LCP) was sampled at 200 samples per second; these channels appear in the output record as channels 1 through 4, respectively [see RS11_10A.TXT or RSC11_11.TXT in the DOCUMENT directory of the archival volume]. Only the S-RCP channel contains a true signal for Galileo. Each ODR data file is accompanied by a full PDS detached label with name ydddhhmm.LBL which completely describes the contents of the ODR file. The format and content of the ODR are also described in RS11_10A.TXT or RSC11_11.TXT in the DOCUMENT directory of each archival volume. Ancillary Data ============== The ancillary files are stored in the CALIB and DOCUMENT directories. Each ancillary file is accompanied by a detached PDS minimal label having the same file name except for the suffix 'LBL'. Low-Gain Antenna (LGA) Radiation Pattern ----------------------------------------- The radiation pattern of the low-gain antenna (LGA) is described in files LGA1_DL.TAB and LGA1_UL.TAB in the CALIB directory. These files provide the radiation patterns for downlink and uplink, respectively. Post-Operations Report ---------------------- The Post-Operations Report describes the tracking coverage, spacecraft activity, and DSN equipment problems in a graphical format. This report is in the DOCUMENT directory. Coordinate System ================= Most data types are not dependent on definition of a coordinate system; for those that are, the user should consult the appropriate SIS for information. Software ======== Software for parsing, reducing, and analyzing data such as these has been developed at the Jet Propulsion Laboratory and elsewhere. Because parsing must be done at the bit level, its implementation may be very sensitive to platform and operating system. No parsing has been written and tested on a variety of platforms, so none has been included with the archival data set. Users are referred to PDS labels, to files in the DOCUMENT directory, and to hard copy Software Interface Specifications for detailed information on file formats. Media/Format ============ The archival data set is written on CD-WO media using the Young Minds CD Studio authoring system. The CD-WO volume conforms to ISO 9660 standards." CONFIDENCE_LEVEL_NOTE = " Overview ======== There are no known limitations to use of these data, subject to signal-to-noise considerations which would be typical for systems of this type. Review ====== Prior to creation of the final version of the archival data set, key elements of the archive were distributed for preliminary review. These included electronic versions of example PDS labels, CATALOG files, and Software Interface Specifications. These materials were distributed to PDS personnel and the PDS Radio Science advisor. Data Coverage and Quality ========================= The data cover the periods of solar conjunction between December, 1991, and February, 1997. There are no known quality issues which would limit use of these data other than the normal signal-to-noise constraints. Limitations =========== None." END_OBJECT = DATA_SET_INFORMATION OBJECT = DATA_SET_TARGET TARGET_NAME = SUN END_OBJECT = DATA_SET_TARGET OBJECT = DATA_SET_HOST INSTRUMENT_HOST_ID = GO INSTRUMENT_ID = RSS END_OBJECT = DATA_SET_HOST OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = "ANDERSONETAL1992" END_OBJECT = DATA_SET_REFERENCE_INFORMATION END_OBJECT = DATA_SET END |