PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 16386 FILE_RECORDS = 1464 ^IMAGE = "RCP.IMG" INSTRUMENT_HOST_NAME = "CLEMENTINE 1" TARGET_NAME = "MOON" INSTRUMENT_NAME = "RADIO SCIENCE SUBSYSTEM" DATA_SET_ID = "CLEM1-L-RSS-5-BSR-V1.0" PRODUCT_ID = "RCP.IMG" PRODUCT_RELEASE_DATE = 2000-04-30 DESCRIPTION = " This file contains a 2-D array in PDS image format showing RCP power vs frequency and time when the Clementine BETA=0 point was closest to the Lunar South Pole. The image has 1464 rows with 1024 samples (pixels) in each row. Each row is a power spectrum representing 0.65536 seconds of data; frequency resolution is approximately 1.5259 Hz. Each spectrum was derived by taking a Fourier Transform of 16384 complex time samples, saving frequency bins 7356-8379, and multiplying each value by its complex conjugate. In the original data the South Pole echo was expected to be at 12500 Hz (bin 8193). The data were calibrated by computing the average radiothermal noise level in the 40 highest frequency bins in all spectra (58560 points total) -- about a 0.5 percent determination of the statistical noise level. The data were normalized by the average noise, and the noise pedestal (=1.0) was removed. The result was then multiplied by Boltzman's constant and the system temperature -- assumed to be the sum of the receiver temperature (18.41K) and a contribution from the lunar limb (61.45K). The values in the image are thus in units of watts per Hz. Time of South Pole closest approach was taken to be 18:46:36.5 ERT (designated t0). The first row in the image is centered on t0-591.1624 s; the last row is centered on t0+367.6293 s. If the frequency of the South Pole bin in the image is taken to be f0 (bin 838), then the first sample in each row of the image is at f0-1275.6 Hz and the last sample in each row is at f0+285.3394 Hz. Each sample is represented as an ASCII real number in E16.7 format. Each row requires 16384 bytes for storage of 1024 sample values; each row is delimited by an ASCII carriage-return line-feed pair. This image was produced by Dick Simpson, Radio Science Advisor to the NASA Planetary Data System." START_TIME = 1994-04-09T18:36:45 STOP_TIME = 1999-04-09T18:52:44 SOFTWARE_NAME = "FNDLOOK" PRODUCT_CREATION_TIME = 1998-03-20T00:00:00 PRODUCER_ID = "PDS RS" OBJECT = IMAGE LINES = 1464 LINE_SAMPLES = 1024 SAMPLE_TYPE = ASCII_REAL SAMPLE_BITS = 16 OFFSET = 0.0 SCALING_FACTOR = 1.0 FORMAT = "E16.7" DESCRIPTION = "This image contains values of received right circularly polarized signal power versus frequency and time in units of watts per Hertz. Format is E16.7. The first row in the image is the earliest power spectrum; it was taken 591.2 s before the BETA=0 point passed closest to the South Pole. Succeeding spectra/rows are spaced by 0.65536 s. The South Pole closest approach corresponds to spectrum 903. The first sample in each row is 1275.6 Hz below the South Pole bin; succeeding samples are spaced by approximately 1.5259 Hz. The South Pole echo is in bin 838." END_OBJECT = IMAGE END