NSSDCA ID: PSPG-00264
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
Time span: 1978-12-05 to 1981-09-01
These experimenter-supplied, radar altimeter composite data are on EBCDIC magnetic tape created on an IBM 360 computer. Each file of data consists of 80-byte logical records arranged in 8 different arrays. The first 5 arrays are fixed length (either 1000 double-precision floating point fields or 1000 16-bit integer fields), and each fits exactly into an integral number of logical records. The remaining 3 arrays are of varying length. The arrays consist of the following: periapsis times (ms) counting from midnight December 30/31 of the previous year; semi-major axes of the osculating orbital ellipse at periapsis (km); eccentricity of the osculating orbital ellipse at periapsis; data source codes; data editing levels (no. of times the data have been processed by the editing system); 7 sub-arrays of altimetry data consisting of crust-fixed latitudes and longitudes; planetary radius; Hagfors scattering law parameter (C); Fresnel reflection coefficient; spacecraft radial velocity (km/s); and orbit number and roll number relative to periapsis; and latitude and longitude pointer arrays that index the altimeter data arrays, used to reference the data in the altimeter data section by increasing the value of the crust-fixed latitudes and longitudes. These data are on the Composite Data (CD) tape (which contain data from many experiments) created by the Unified Abstract Data System (UADS).
Questions and comments about this data collection can be directed to: Dr. David R. Williams
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Gordon H. Pettengill | Data Provider | Massachusetts Institute of Technology | ghp@space.mit.edu |