PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 91 FILE_RECORDS = 512 ^TABLE = "BSR0135L.SPC" INSTRUMENT_HOST_NAME = "MARS GLOBAL SURVEYOR" TARGET_NAME = "MARS" INSTRUMENT_NAME = "RADIO SCIENCE SUBSYSTEM" DATA_SET_ID = "MGS-M-RSS-5-SDP-V1.0" PRODUCT_ID = "BSR0153L.SPC" PRODUCT_RELEASE_DATE = 2007-09-25 BAND_NAME = "X" TRANSMITTED_POLARIZATION_TYPE = "RIGHT CIRCULAR" RECEIVED_POLARIZATION_TYPE = "LEFT CIRCULAR" DESCRIPTION = "This table contains power spectra from a Mars Global Surveyor (MGS) bistatic radar (BSR) experiment. The observations were conducted at X-Band (3.6 cm wavelength). The spacecraft transmitted signal was about 21 watts and had right-circular polarization (RCP). The ground antenna was the NASA Deep Space Network (DSN) 70-m reflector near Madrid, Spain, using both X-RCP and X-LCP. On this orbit, the track of the specularly reflecting region passed very close to the target landing site of the unsuccessful Mars Polar Lander (MPL) spacecraft." NOTE = "Spectra normalized to unit amplitude were published by Simpson and Tyler (Icarus, 152, 70-74, 2001; Figure 3). In the text of that paper a nominal system temperature of T = 21 kelvins was assumed; the system temperature assumed here is 30 K based on more recent experience. The change does not affect the conclusions of Simpson and Tyler so long as both receivers are assumed to have the same value." START_TIME = 2000-05-14T13:47:20 STOP_TIME = 2000-05-14T13:56:20 SOFTWARE_NAME = "N/A" PRODUCT_CREATION_TIME = 2007-09-25T00:01:00 PRODUCER_ID = "MGS RST" OBJECT = TABLE ROWS = 512 COLUMNS = 10 ROW_BYTES = 91 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "This table contains power spectra from the MGS BSR X-LCP receiving system. Columns 2-10 each contain a 60-second average power spectrum (average of 2929 individual spectra). The 512 rows each contain the power in one frequency bin having a width of B = 25000/512 Hz (about 48.8 Hz). A nominal system temperature T = 30 kelvins was assumed, meaning that the background noise power should be approximately Pn = kTB = 2.0E-20 watts, at frequencies where there is neither carrier nor echo signal. Column 1 contains the center frequency of the frequency bin. The table is in ASCII; columns are delimted by commas and each row ends with a carriage-return (ASCII 13) line-feed (ASCII 10) pair." OBJECT = COLUMN NAME = "BIN FREQUENCY" COLUMN_NUMBER = 1 DATA_TYPE = ASCII_REAL START_BYTE = 1 BYTES = 8 FORMAT = "F8.1" OFFSET = 0. SCALING_FACTOR = 1. UNIT = "HERTZ" DESCRIPTION = "The (relative) frequency within the power spectrum. During the experiment, the ground receiver was tuned to follow the expected frequency of the spacecraft carrier, which was offset from its normal center position by about 8 kHz. The carrier can be seen in some spectra at about 20590 Hz. The surface echo is broadened and lower in frequency than the carrier because of different Doppler shifts along the carom paths which contribute to the echo." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "XL1" COLUMN_NUMBER = 2 DATA_TYPE = ASCII_REAL START_BYTE = 10 BYTES = 8 FORMAT = "F8.4" OFFSET = 0. SCALING_FACTOR = 1.0E-20 UNIT = "WATT" DESCRIPTION = "Average power in the X-LCP spectrum during 60 seconds centered on 13:47:50. The true power can be recovered by applying the SCALING_FACTOR and OFFSET as follows: TRUE_RECEIVED_POWER = OFFSET + SCALING_FACTOR*TABLE_VALUE " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "XL2" COLUMN_NUMBER = 3 DATA_TYPE = ASCII_REAL START_BYTE = 19 BYTES = 8 FORMAT = "F8.4" OFFSET = 0. SCALING_FACTOR = 1.0E-20 UNIT = "WATT" DESCRIPTION = "Average power in the X-LCP spectrum during 60 seconds centered on 13:48:50. The true power can be recovered by applying the SCALING_FACTOR and OFFSET as follows: TRUE_RECEIVED_POWER = OFFSET + SCALING_FACTOR*TABLE_VALUE " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "XL3" COLUMN_NUMBER = 4 DATA_TYPE = ASCII_REAL START_BYTE = 28 BYTES = 8 FORMAT = "F8.4" OFFSET = 0. SCALING_FACTOR = 1.0E-20 UNIT = "WATT" DESCRIPTION = "Average power in the X-LCP spectrum during 60 seconds centered on 13:49:50. The true power can be recovered by applying the SCALING_FACTOR and OFFSET as follows: TRUE_RECEIVED_POWER = OFFSET + SCALING_FACTOR*TABLE_VALUE " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "XL4" COLUMN_NUMBER = 5 DATA_TYPE = ASCII_REAL START_BYTE = 37 BYTES = 8 FORMAT = "F8.4" OFFSET = 0. SCALING_FACTOR = 1.0E-20 UNIT = "WATT" DESCRIPTION = "Average power in the X-LCP spectrum during 60 seconds centered on 13:50:50. The true power can be recovered by applying the SCALING_FACTOR and OFFSET as follows: TRUE_RECEIVED_POWER = OFFSET + SCALING_FACTOR*TABLE_VALUE " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "XL5" COLUMN_NUMBER = 6 DATA_TYPE = ASCII_REAL START_BYTE = 46 BYTES = 8 FORMAT = "F8.4" OFFSET = 0. SCALING_FACTOR = 1.0E-20 UNIT = "WATT" DESCRIPTION = "Average power in the X-LCP spectrum during 60 seconds centered on 13:51:50. The true power can be recovered by applying the SCALING_FACTOR and OFFSET as follows: TRUE_RECEIVED_POWER = OFFSET + SCALING_FACTOR*TABLE_VALUE " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "XL6" COLUMN_NUMBER = 7 DATA_TYPE = ASCII_REAL START_BYTE = 55 BYTES = 8 FORMAT = "F8.4" OFFSET = 0. SCALING_FACTOR = 1.0E-20 UNIT = "WATT" DESCRIPTION = "Average power in the X-LCP spectrum during 60 seconds centered on 13:52:50. The true power can be recovered by applying the SCALING_FACTOR and OFFSET as follows: TRUE_RECEIVED_POWER = OFFSET + SCALING_FACTOR*TABLE_VALUE " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "XL7" COLUMN_NUMBER = 8 DATA_TYPE = ASCII_REAL START_BYTE = 64 BYTES = 8 FORMAT = "F8.4" OFFSET = 0. SCALING_FACTOR = 1.0E-20 UNIT = "WATT" DESCRIPTION = "Average power in the X-LCP spectrum during 60 seconds centered on 13:53:50. The true power can be recovered by applying the SCALING_FACTOR and OFFSET as follows: TRUE_RECEIVED_POWER = OFFSET + SCALING_FACTOR*TABLE_VALUE " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "XL8" COLUMN_NUMBER = 9 DATA_TYPE = ASCII_REAL START_BYTE = 73 BYTES = 8 FORMAT = "F8.4" OFFSET = 0. SCALING_FACTOR = 1.0E-20 UNIT = "WATT" DESCRIPTION = "Average power in the X-LCP spectrum during 60 seconds centered on 13:54:50. The true power can be recovered by applying the SCALING_FACTOR and OFFSET as follows: TRUE_RECEIVED_POWER = OFFSET + SCALING_FACTOR*TABLE_VALUE " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "XL9" COLUMN_NUMBER = 10 DATA_TYPE = ASCII_REAL START_BYTE = 82 BYTES = 8 FORMAT = "F8.4" OFFSET = 0. SCALING_FACTOR = 1.0E-20 UNIT = "WATT" DESCRIPTION = "Average power in the X-LCP spectrum during 60 seconds centered on 13:55:50. The true power can be recovered by applying the SCALING_FACTOR and OFFSET as follows: TRUE_RECEIVED_POWER = OFFSET + SCALING_FACTOR*TABLE_VALUE " END_OBJECT = COLUMN END_OBJECT = TABLE END