NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

Burst Receiver Hourly Plots (Digitized)

NSSDCA ID: PSFP-00820

Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)

Description

This collection consists of digitized microfilm frames containing plots of the relative antenna temperature as a function of time at eight selected frequency channels for both the upper V-antenna (burst receiver, BR-1) and the lower V-antenna (burst receiver, BR-2). For BR-1, the data are shown on plots of the 32 different frequencies in four groups of 8: 0.025 - 0.110 MHz; 0.130 - 0.425 MHz; 0.475 - 1.085 MHz; and 2.20 - 13.1 MHz. (The original data description says the frequencies displayed are 9.18, 4.17, 2.20, 1.03, 0.475, 0.250, 0.110, and 0.044 MHz). The same frequencies are used in the BR-2 plots except for the lowest channel, which is 0.055 MHz.

The UT hour is at the beginning of the plot interval, and the dates (yy/mm/dd format) are shown in the lower left-hand corner. Eight panels of data are displayed, with the highest frequency data in the top panel and the lowest frequency data at the bottom. The frequency channel for each plot is identified in megahertz at the right-hand end of each plot. The relative antenna temperature displays (called calibration temperature) are logarithmic plots that cover a total dynamic range of 80 dB, from 4 to 12; the horizontal grid lines are plotted at decade intervals. The calibration temperature is the equivalent noise temperature (in K) from a 50-ohm generator that would give the same receiver output as that observed in flight. Vertical grid lines are plotted every 2 min and are labeled for every 4 min after the hour. When lunar occultations of Earth or Sun occurred, the times of the geometric occultation (first contact to last contact) are shown by solid lines along the bottom of the frame. Such occultation periods are identified by an E for Earth and an S for Sun.

For this digitization effort the NSSDCA scanned the source microfilm collection PSFP-00103 at a resolution of 400 dots per inch and output each frame on the film as one TIFF file. The NSSDCA also combined the TIFF images into a multipage PDF file to facilitate browsing. Both formats are included in this collection.

Disciplines

  • Space Physics: Magnetospheric Studies
  • Planetary Science: Fields and Particles
  • Astronomy: Radio

Additional Information

Spacecraft

Experiments

Questions and comments about this data collection can be directed to: Ms. Stephanie A. McLaughlin

 

Personnel

NameRoleOriginal AffiliationE-mail
Mr. J. Leon StrandGeneral ContactNASA Jet Propulsion Laboratory
[USA.gov] NASA Logo - nasa.gov