Data Description Title Gif
Itemization Gif Data Description
Itemization Gif Dataset Naming Convention
Itemization Gif Flux and Rate Mnemonic Naming Convention

Data Description

The data files in the COHO archive are in ASCII text format with variable length formatted records readable by this Fortran program. The records of these datasets contain words with information on start time, data quantities present, averaging interval, and ASCII character data descriptions of the specific coincidence logic condition which gives rise to the data quantity being presented.

If the Error value is -1.0, data for this item is not available. If the Flux and Error are 0.0 no events occurred during the collection time. The units of the data and error quantities are Particles/(cm2-sec-ster-MeV/n)

The format of the text data is generally as follows: 

        Record #:    general length   description

              1        C*12        Satellite name
              2        C*n         Start time of first 6 hour average
                                   present
              3        C*n         Stop  time of last 6 hour average
                                   present
              4        C*3         Number of bins (data quantities
                                   present)

        Records 5-(N+4) (where N = number of bins): Bin Label
                          Records
                       C*3         bin number
                       C*n         Character data label description

        Records N+4- ...  Data records:

                       C*19        Start time as yy-mm-ddThh:mm:ss
                       C*15        Value of data quantity 1
                       C*15        Error in data quantity 1
                       .           .
                       .           .
                       C*15        Value of data quantity N
                       C*15        Error in data quantity N

Dataset Naming Convention

The CRS files in the COHO archive are named according to the start time of the data contained in the file (i.e. vy1crsxx.dat, where the xx represents the year of the data). Each file1, except for 1977 (vy1crs77.dat vy2crs77.dat), contains data from January 1 to December 31. For Voyager-1 the 1977 data starts on September 7 and for Voyager-2 the 1977 data starts on August 24.

1The Voyager-2 instruments underwent configuration changes in 1979 and 1982 resulting in two data files for each of these years.

Flux and Rate Mnemonic Naming Convention

The following links for Voyager-1 and Voyager-2 describe our mnemonic naming convention for the potential fluxes and rates present in our database if all data quantities were present for the cruise lifetime. Lists of the exact data quantities we have included in the archive data files can also be viewed through these links.

Go To Voyager-1 Data Mnemonics Gif Go To Voyager-2 Data Mnemonics Gif

Go To Top of This Page Gif Return to the top of this page.

Go Back To Heliopause Homepage Gif Return to the Voyager Cosmic Ray Subsytem page.