urn:nasa:pds:clementine1_bistatic:sort:srtpwrl 1.0 1.21.0.0 Product_Observational 2024-04-26 1.0 Product migrated to PDS4 from PDS3. 1994-04-09T18:36:45Z 1999-04-09T18:52:44Z Deep Space Program Science Experiment Mission urn:nasa:pds:context:investigation:mission.deep_space_program_science_experiment data_to_investigation Clementine 1 Clementine 1 Host urn:nasa:pds:context:instrument_host:spacecraft.clem1 is_instrument_host Radio Science Subsystem Instrument urn:nasa:pds:context:instrument:clem1.rss is_instrument Moon Satellite urn:nasa:pds:context:target:satellite.earth.moon data_to_target srtpwrl.tab 2000-04-12T16:25:00 SORTED LCP POWER 0 7272 This table contains LCP echo measurements which can be associated with 72 'target' points near the lunar South Pole and for which the bistatic angle was between -5 and +5 degrees at the target. Clementine bistatic radar echoes between 18:36:00 and 18:52:00 on 1994-04-09 were stored as 1464 1024-point power spectra. Every frequency bin in every spectrum can be associated with a contour of constant Doppler offset from the South Pole. Each contour comes closest to one of 72 'target' points defined on the surface. Target points are spaced by one second in time and satisfy the condition that the bistatic angle (BETA) passes through zero at some time during the experiment. The target points are given in BETAZER0.TAB and BETAZER1.TAB in the GEOMETRY directory of this archive. RCP echoes were sorted into array PWRR(BETA,TARGET,ELEMENT); LCP echoes were sorted into PWRL(BETA,TARGET,ELEMENT). TARGET depends on which target point fell within the 1.53 Hz Doppler bin. If none, the measurement was not included in the array. If yes, the value for TARGET was between 1 and 72, where the targets are in time order and 72 is the number of the final target point on the surface -- 6.5 seconds after South Pole closest approach. The bistatic angle was computed for the target selected at the time of the measurement. Bins of width 0.1 degree were defined centered on BETA = -5.0, -4.9, -4.8, ..., 4.8, 4.9, 5.0 Negative values of BETA indicate observation times before BETA = 0. Each successfully binned measurement at (BETA,TARGET) was assigned an ELEMENT number, starting from 1. The maximum number of points assigned at any (BETA,TARGET) was 42. Hence, the dimensions of PWRR and PWRL are 101x72x42. Unused ELEMENT positions are padded with zeros. The file SRTNPWR.TAB tells how many of the points at each (BETA,TARGET) are valid. The number applies to both PWRR and PWRL. The table consists of three columns. The first column is an index for BETA. The second column is an index for target number. The third column (containing 42 items) gives the measured values of LCP echo power which have been accumulated into this array. Columns and items are delimited by commas. Each row in the table is delimited by an ASCII carriage-return line-feed pair. Carriage-Return Line-Feed 2 1 346 BETA INDEX 1 1 ASCII_Integer 4 The BETA index for the three-dimensional array of sorted LCP power. The index increases from 1 to 101 as the bistatic angle BETA increases from -5.0 to +5.0 in steps of 0.1 degree. TARGET INDEX 2 6 ASCII_Integer 3 The TARGET index for the three-dimensional array of sorted LCP power. The index increases from 1 to 72 as the target moves from the Earth facing hemisphere past the South Pole to the limb. Targets are spaced by 1 second; the 72nd target was 6.5 seconds beyond the South Pole. Targets listed in files BETAZER0.TAB and BETAZER1.TAB in the GEOMETRY directory of this archive. 1 42 2 0 Values of left-circularly polarized (LCP) echo power which have been extracted from the time vs frequency array of LCP power spectra and which can be binned according to (1) their proximity to a 'target' point and (2) the bistatic angle at the target point when the measurement was made. The first N of these 42 values are valid measurements of LCP power; N is given by the corresponding entry in SRTNPWR.TAB. For example, if the value at (BETA_INDEX=3,ITEM=TARGET=5) in SRTNPWR.TAB is 11, then the first 11 items in this column are valid measurements of LCP echo power (the remaining 31 entries should be set to 0.00). 10 336 LCP ECHO POWERS 1 1 ASCII_Real 7 nanopicowatt per hertz [UNUSED] 2 8 ASCII_String 1 Field added during migration from PDS3 to accommodate inter-field bytes. These bytes are not documented in the PDS3 label. srtpwrl.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed