urn:nasa:pds:magellan_bsr_calibrated:sc2:41561302 1.0 1.22.0.0 Product_Observational 2008 This file contains coefficients for a third-order polynomial which, when evaluated, gives the frequency of a signal of interest over a range of times. The file has eleven header lines, then an arbitrary number of lines, each listing four coefficients for a cubic equation, valid over a time interval that is specified at the end of the line. The file is used as input to the 'steering' process, developed by G.L. Tyler, for adjusting the frequency of digitally sampled data at Stanford University. 2025-01-27 1.0 Product migrated to PDS4 from PDS3. 1994-06-05T13:02:21Z 1994-06-05T13:53:12Z 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 63 SUE SC2 41561302.sc2 2008-04-24T20:47:17

HDR_TABLE 0 1540 7-Bit ASCII Text The Header Table is one logical row (eleven physical records) of 1540 bytes with identifying information about the steering coefficients which follow. Most of the row is filled with miscellaneous text (including ASCII blanks and carriage-return line-feed pairs at the end of each physical record, which is not described here.

COEFFICIENTS_TABLE 1540 205 The Coefficients Table contains double precision coefficients which can be used to evaluate a cubic equation over a specified time interval (T1 <= t <= T2). The equation gives the frequency f of a signal of interest f = F0 + F1*(t-T1) + F2*(t-T1)^2 + F3*(t-T1)^3 where F0, F1, F2, F3, T1, and T2 are given in the columns of the Coefficients Table. For the 'steering' operation carried out by Stanford University, the frequency (and phase) of the signal is continuous between adjacent intervals. Carriage-Return Line-Feed 6 0 140 F0 1 1 ASCII_String 23 hertz Signal frequency at the beginning of the time interval T1. The constant coefficient. F1 2 24 ASCII_String 23 hertz per second per second First derivative of the signal frequency at the beginning of the time interval T1. The linear coefficient. F2 3 47 ASCII_String 23 hertz per second per second Second derivative of the signal frequency at the beginning of the time interval T1. The quadratic coefficient. F3 4 70 ASCII_String 23 hertz per second per second per second Third derivative of the signal frequency at the beginning of the time interval T1. The cubic coefficient. T1 5 93 ASCII_String 23 second Beginning of the time interval over which the coefficients in columns 1-4 apply. Measured in seconds past 0h. T2 6 116 ASCII_String 23 second End of the time interval over which the coefficients in columns 1-4 apply. Measured in seconds past 0h. 41561302.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed