MGN RSS Calibrated Data Record (SRG)

SRG – RSS Calibrated Data Record

Instrument: Magellan Radio Science

PDS3 Data Set ID: MGN-V-RSS-4-BSR-V1.0DOI: 10.17189/1522531

PDS4 Bundle: urn:nasa:pds:magellan_bsr_calibratedDOI: 10.17189/c7sf-7t57

For more information about RSS SRG products, see the Bistatic Radar Calibrated Data Set Description.

The Radio Science Subsystem (RSS) Calibrated Data Record (SRG) data product is a single file that summarizes the Magellan Bistatic Radar experiment geometry at one minute time increments over eight hours. This is an ASCII file containing a single header row followed by 480 data rows.

The SRG header row gives:

  1. DSN antenna number (63)

  2. Input BSP file name (4156156A.BSP)

  3. Assumed spherical radius of Venus (6,051,800 m)

  4. Assumed speed of light in vacuum (299,792,458 m/s)

  5. Latitude of a specific target (arbitrarily set to +70 deg)

  6. Longitude of a specific target (arbitrarily set to 0 deg)

  7. Time spacing between rows in the data table (60 seconds)

The SRG data rows contain the following. “Specific target” is the surface point with latitude and longitude given in positions 5-6 of the header row. “Backscatter point” is where a line drawn from the DSN antenna through the spacecraft (and beyond) would intercept the surface. The “raypath closest approach” (RCA) point is where such a line would be closest to Venus if there were no intercept and if Venus were between the DSN and spacecraft. The “specular point” is where spacecraft-to-surface-to-DSN mirror-like reflection would occur. If the spacecraft is in occultation, these points are not meaningful; existence of the backscatter point precludes existence of the RCA point. Vectors are in J2000 coordinates, distances are in meters, velocities are in m/s, and angles are in degrees.

The RSS SRG file is named 4156N00A.SRG, with its corresponding label file.

In ODE, the SRG file has the following product ID:

4156N00A