urn:nasa:pds:magellan_bsr_calibrated:prr:4156155d 1.0 1.22.0.0 Product_Observational 2008 This file contains double precision complex time samples, originally from an open loop receiver at a site like a NASA Deep Space Network station. The original integer samples have been converted to double precision complex format; amplitude and/or frequency filtering may have been applied. The header record for this file may provide brief history information. The remainder of the file contains time samples. The file is in the FND format adopted and used by G.L. Tyler's group at Stanford University (the Stanford University Element, or SUE). 2025-01-27 1.0 Product migrated to PDS4 from PDS3. 1994-06-05T15:58:12.019Z 1994-06-05T16:14:11.947Z Magellan Mission urn:nasa:pds:context:investigation:mission.magellan data_to_investigation Alias: Venus Radar Mapper Magellan Host urn:nasa:pds:context:instrument_host:spacecraft.mgn is_instrument_host Radio Science Subsystem Instrument urn:nasa:pds:context:instrument:mgn.rss is_instrument Venus Planet urn:nasa:pds:context:target:planet.venus data_to_target BSR S left circular 63 SUE FND 4156155d.prr 2008-04-23T21:19:10 FND_HDR_TABLE 0 1 The FND header contains ancillary data for understanding the content of the FND table which follows. The first 272 bytes of the Header row contain information; the remainder of the row is padded with undefined bytes. The FND Header is stored in binary format. 31 0 2048 EXPERIMENT YEAR 1 1 SignedMSB4 4 The 4-digit year in which the data were collected. EXPERIMENT MONTH 2 5 SignedMSB4 4 The 2-digit month in which the data were collected. EXPERIMENT DAY 3 9 SignedMSB4 4 The 2-digit day in which the data were collected. EXPERIMENT HOUR 4 13 SignedMSB4 4 The 2-digit hour when the first data sample was taken. The time system will depend on the observatory; but it will typically be UTC. EXPERIMENT MINUTE 5 17 SignedMSB4 4 The 2-digit minute when the first data sample was taken. The time system will depend on the observatory; but it will typically be UTC. EXPERIMENT SECOND 6 21 SignedMSB4 4 The 2-digit second when the first data sample was taken. The time system will depend on the observatory; but it will typically be UTC. The first sample in this FND file will generally be later than the first sample collected because a few samples are lost in in the FND filtering process (see column 21 below). ORIGINAL FILE NAME 7 25 ASCII_String 20 The name of a parent file; this will sometimes be the name of the original file from the open-loop receiver (suffix *.ODR or *.RSR). Left justified in the column. DSN STATION NUMBER 8 45 SignedMSB4 4 The number of the DSN antenna used to collect the open-loop data. Values of 14, 43, and 63 mean that the receiving antenna was 70-m. BAND NAME 9 49 ASCII_String 4 An abbreviation indicating the radio band used when collection the data. Left justified in the column. Valid entries include: S S-Band (13 cm wavelength) X X-Band (3.6 cm wavelength) RECEIVED POLARIZATION TYPE 10 53 ASCII_String 4 An abbreviation indicating the radio polarization of the receiving antenna and feed. Left justified in the column. Valid entries include: R right circular polarization L left circular polarization TRANSMIT FREQUENCY 11 57 IEEE754MSBDouble 8 hertz The frequency transmitted by the source of the radio signal sampled in this FND file. Set to 0 if not known. PROGRAM NAME 12 65 ASCII_String 16 Name of the program which created this FND file. PROGRAM VERSION 13 81 ASCII_String 16 Version of the program given in column 12. PROCESSING YEAR 14 97 SignedMSB4 4 Year on which the program listed in column 12 was executed. PROCESSING MONTH 15 101 SignedMSB4 4 Month on which the program listed in column 12 was executed. PROCESSING DAY 16 105 SignedMSB4 4 Day on which the program listed in column 12 was executed. PROCESSING HOUR 17 109 SignedMSB4 4 Hour on which the program listed in column 12 was executed. PROCESSING MINUTE 18 113 SignedMSB4 4 Minute on which the program listed in column 12 was executed. PROCESSING SECOND 19 117 SignedMSB4 4 Second on which the program listed in column 12 was executed. REFERENCE TIME 20 121 IEEE754MSBDouble 8 second Time in seconds since 0h, adopted as a reference when many files are processed together coherently. START TIME 21 129 IEEE754MSBDouble 8 second Time in seconds since 0h associated with the first sample in this FND file. This time will be slightly later than the time from columns 4-6 because FND processing causes a few samples at the beginning and end of the file to be lost. LAST TIME 22 137 IEEE754MSBDouble 8 second Time in seconds since 0h associated with the first sample in the last record of this FND file. SAMPLE INTERVAL 23 145 IEEE754MSBDouble 8 second Spacing between consecutive complex samples in this FND file. SCALING FACTOR 24 153 IEEE754MSBDouble 8 An amplitude scaling factor that should be applied to the sample values in this FND file. Often set to 1 (no scaling). FIRST FND FREQUENCY 25 161 IEEE754MSBDouble 8 hertz The lowest frequency retained in a previous digital filtering step. Without knowing original bandwidth and knowledge of other filtering operations, this may not be useful information. LAST FND FREQUENCY 26 169 IEEE754MSBDouble 8 hertz The highest frequency retained in a previous digital filtering step. Without knowing original bandwidth and knowledge of other filtering operations, this may not be useful information. DECIMATION RATIO 27 177 SignedMSB4 4 The ratio by which original bandwidth was reduced in a previous step of digital filtering. For example, if the original bandwidth was 100 kHz and the decimation ratio was 4, the new bandwidth would be 25 kHz and the sample interval would be 0.000040. FIRST FND BIN 28 181 SignedMSB4 4 The bin number corresponding to the first FND frequency (column 25) in a previous digital filtering operation. RECORD LENGTH 29 185 SignedMSB4 4 byte Length of each record in this FND file. SAMPLE BITS 30 189 SignedMSB4 4 bit Number of bits in each complex sample in this FND file. For example, if this value is 128, the I and Q components of the sample each have 64 bits and each is 'double precision.' COMMENT 31 193 ASCII_String 80 An operator comment from a previous processing step. Ordinarily a new comment will overwrite an old one; but old comments will propagate forward if the operator makes no change. FND_TABLE 2048 187487 The FND Table contains double precision complex time samples from an open-loop radio science receiver. In many cases digital filtering will have been applied to the original sample values before this file is created. The data are organized into a PDS TABLE object with a single COLUMN having 128 items. 0 1 2048 1 128 1 0 Complex double precision samples. 1 2048 SAMPLES 1 1 ComplexMSB16 16 4156155d.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed