Ultraviolet Spectrometer Data

Description

This data set consists of UV spectrometer data on magnetic tape created on a PDP computer. The data are multifiled with volume header, file header, and trailer records. The tape begins with an 80-character volume label, and each data file has file header 1, file header 2, UV spectrometer data file, file trailer label 1, file trailer label 2, and end of file marker. Using a PDP computer, the data can be accesssed without concern for the header and trailer records. With other computers, one simply reads and ignores the extraneous information except the UV spectrometer files. An important caution in reading the data with non-PDP computers is that PDP computers have a nonstandard way of representing 16-bit integers, i.e., the first 8-bit byte read in is the low-order part, contrary to IBM and most other U.S. computers. Therefore, one should reverse all the byte pairs in integer data. For further information on the main data base and this data set, contact Dr. Einar Tandberg-Hanssen, Code ES-01, NASA Marshall Space Flight Center, Huntsville, AL 35812.