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



Availability: Archived at NSSDC, accessible from elsewhere


This description was generated automatically using input from the Planetary Data System.

Data Set Overview ================= Instrument P.I. : James W. Warwick Data Supplier : Michael L. Kaiser Data sampling rate : 48 seconds Data Set Start Time : 1979-04-25T00:00:00.000Z Data Set Stop Time : 1979-08-04T23:04:00.000Z This data set consists of edited browse data derived from an original data set obtained from the Voyager 2 Planetary Radio Astronomy (PRA) instrument in the vicinity of Jupiter. Data are provided for 70 instrument channels covering the range from 1.2 kHz to 1326 kHz in uniform 19.2 kHz steps, each 1 kHz wide. Data are included for the period 1979-04-25 00:00:00.000 through 1979-08-04 23:04:00.000. In order to produce this data set from the original raw PRA data, several steps have been taken: 1. The PRA operates in a variety of modes; data from modes in which the receiver does not scan rapidly through its frequency range have been removed; 2. The data have been calibrated as best we know how; 3. The data have been split into Left Hand Circular (LHC) and Right Hand Circular (RHC) components; 4. The data have been binned into 48-second intervals. Thus, values at a given channel are separated in time by an increment of 48 seconds; each 48-second time interval has associated with it a value for LHC polarization and one for RHC polarization. During data gaps, the entire record is absent from the data set; that is, missing records have not been zero-filled or otherwise marked. Bad data within a record is indicated by the value zero, which cannot otherwise occur. Each datum is returned as a 16-bit quantity; it represents the mean power received in the given channel at the specified time and polarization. The returned quantity is the value in mB about a reference flux density. To convert a returned quantity to flux, use the formula: flux = 7.0x10^(-22)x10^(mB/1000) W m-2 Hz-1 Parameters ========== Data Set Parameter 'RADIO WAVE SPECTRUM' ---------------------------------------Data Set Parameter Name : RADIO WAVE SPECTRUM Data Set Parameter Unit : MILLIBEL Sampling Parameter Name : TIME Sampling Parameter Unit : SECOND Sampling Parameter Resolution : 0.001 Sampling Parameter Interval : 48 Minimum Available Sampling Int : 12 Noise Level : 2400 A set of derived parameters consisting of power fluxes at various contiguous frequencies over a range of frequencies. Millibels may be converted to watts/m**2/Hz by using the formula for flux indicated above. Source Instrument Parameters ============================ Instrument Host ID : VG2 Data Set Parameter Name : RADIO WAVE SPECTRUM Instrument Parameter Name : WAVE FLUX DENSITY ELECTRIC FIELD WAVEFORM ELECTRIC FIELD COMPONENT MAGNETIC FIELD COMPONENT WAVE ELECTRIC FIELD INTENSITY WAVE MAGNETIC FIELD INTENSITY Important Instrument Parameters : 1 (for all parameters) Data Coverage ============= Filename Records Start Stop ------------------------------------------------------------------Volume ID: VG_1502 PRA.DAT 128633 1979-04-25T00:00:00.000Z 1979-08-04T23:04:00.000Z

These data are available on-line from the Planetary Data System (PDS) at:

Alternate Names



  • Planetary Science: Fields and Particles

Additional Information



Questions and comments about this data collection can be directed to: Dr. Edwin V. Bell, II



NameRoleOriginal AffiliationE-mail
Mr. Michael L. KaiserGeneral ContactNASA Goddard Space Flight
[] NASA Logo -