NSSDCA ID: ASVI-00016
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
Time span: 1974-12-11 to 1985-02-18
This "Zodiacal Light" data set (74-097A-11B) is a further processed version of the data, and was corrected for star light and plasma-scattered light. The data were written in binary by a PDP/10, on multifile tapes, with each tape containing one month of data.
There are three other data sets closely related to this "Zodiacal Light" data set (74-097A-11B). The "Reduced Data" set (74-097A-11A) is the original, without correcting for star light and plasma-scattered light. Each of these two named data sets also has an NSSDC-generated ASCII version (74-097A-11D and 74-097A-11C, respectively).
The first file in each month (tape) is a month (tape) header file; but it also includes in sequence all the measurement cycle header blocks. These blocks provide information about the status/health of the instruments, calibration, etc., for all the science data blocks in the month (tape). This file is followed by a series of files, each providing science data. The file structure is as follows: The first block is the measurement cycle header for that file. It is a repeat of the item contained in the month (tape) header file. The second block provides housekeeping information, mainly the average temperatures of the sensors. The third block provides the science data: Stokes parameters (Q) in ultraviolet, blue, and visible lights (U,B,V), polarization angles, Stokes parameters (U), polarized intensities, degrees of polarization, again in the U, B, V bands. In addition to these, the science block includes the above parameters for the actual Zodiacal light, after subtracting out the contaminants, star light and plasma-scattered light. The final, fourth block provides a number of coordinate values and velocity components of the spacecraft and some planets, angles such as earth-Helios-sun angle, aspect angles of some planets, etc.
Questions and comments about this data collection can be directed to: Dr. H. Kent Hills
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Christoph Leinert | Data Provider | Max-Planck-Institut fur Astronomie | leinert@mpia-hd-mpg.de |