Velocity Study

Description

These experimenter-supplied, velocity study data are on binary magnetic tape created on a PDP 11/34 computer. The tapes are multifiled, with each file containing a seven-word header of Radix-50 title information for internal PDP use followed by an experiment header record and a variable number of logical header records and data records of 1024 bytes each. The experiment header record contains tape and experiment identification information, date and orbit number, and satellite position. A logical header record precedes each data record. It contains the dimension of the logical data array of the data record, wavelength information, time at start of logical record, absolute and differential temperatures, gate time, true spacecraft mode, calculated actual azimuth and elevation (for raster experiments only), and experiment type. Each data record contains an array of one of the following three experiment types: (1) multiple line scan (observation of up to eight individual line profiles at a single position) -- a group of lines may be scanned repeatedly to observe changes or shifts in the lines with time, (2) velocity study (identical to line scan except that no more than 64 data points per line profile are allowed and up to 127 wavelength drive steps between observations may be used), and (3) velocity study with limb offset. Data reduction programs for data analysis are available on data set -01I. For more information on this data set, contact Dr. Charles Barth, Laboratory for Atmospheric and Space Physics, Campus Box 392, University of Colorado, Boulder, CO 80309.