Reduced Solar X-ray Fluxes

Description

This data set was supplied by the PI on magnetic tapes generated on a CDC 3800 computer. The tapes contain one or more calendar months of reduced data and are unlabeled, i.e., the flux data begin in the first record. The date and time (UT) associated with each data sample are uniquely defined by appropriate fields within the format. The data are partitioned into records and files according to the following scheme. Each record contains 1 h of data. Each file contains 1 calendar day of data and, thus, is composed of a maximum of 24 records. The records are of variable length, since the number of minutes of data present in each hour commonly varies. The files are also of variable length, since occasionally there are days during which one or more hours of data are lacking. The satellite collected samples of data once a minute. Each minute of reduced data was encoded into a string of 80 BCD characters suitable for punching on cards. The following are general comments about the format of the 80-character string and the measurements it contains: (1) in each string, the date is specified by giving the last digit of the year followed by the day of the year, and the time (UT) is given in hours and minutes; (2) the measurements obtained from experiments 5, 6, and 7B are given in units of energy flux (ergs/sq cm-s); (3) a zero value in any one of the floating-point fields indicates the absence of a measurement from that experiment for that minute; (4) periods of time lasting several minutes during which no solar radiation measurements cound be obtained, such as when the satellite passed through the earth's shadow. For more information on this data set, contact Dr. Robert Kreplin, Naval Research Laboratory, 4555 Overlook Avenue S.W., Washington, DC 20375.