The ascii data presented through the search page on this site are given in the following format:

First the filename (e.g. f13_rl011211515.txt meaning F13, 2001, doy 121, starting time 1515 UT) is given on the first line. The second and third lines give the descriptive headings for each column. Each following line lists one segment of data at a four-second resolution in the following order:

**DATE**(in YYYDDD format, e.g. 101121; note that 1999 = 99, 2000 = 100, 2001= 101, etc.)**TIME**(in seconds of the day; note that if the file goes past midnight UT then the time starts over at zero)**QUALITY FLAG for the RPA data**(1 = good, 2 = caution, 3 = poor, don't use, 4 = undetermined)**QUALITY FLAG for the IDM data**(1 = good, 2 = caution, 3 = poor, don't use, 4 = undetermined)**ALTITUDE**(in kilometers)**GEOGRAPHIC LATITUDE**(in degrees and tenths of degrees)**GEOGRAPHIC LONGITUDE**(east longitude in degrees and tenths of degrees)**MAGNETIC LATITUDE**(in degrees and tenths of degrees)**MAGNETIC LOCAL TIME**(in hours and tenths of hours)**V**(in meters/second; + is in the direction of the spacecraft's velocity; -9999.0 is fill data)_{X}**V**(in meters/second; + is horizontal to the left as you face in the direction of the spacecraft's travel; -9999.0 is fill data)_{Y}**V**(in meters/second; + is in the direction away from the center of the Earth; -9999.0 is fill data)_{Z}**RMS**root mean square error of the RPA curve fit; dimensionless_{X}**SIGMA V**(the standard deviation of the 24 (nominally) measurements of Vy averaged together for this four-second period)_{Y}**SIGMA V**(the standard deviation of the 24 (nominally) measurements of Vz averaged together for this four-second period)_{Z}**N**(the plasma density in number of ions per cubic centimeter; these data come from the scintillation meter, not the RPA)_{i}**FRACTIONAL O+**(the fractional amount of O+ in the plasma; -9999.00 is fill data)**FRACTIONAL He+**(the fractional amount of He+ in the plasma; -9999.00 is fill data)**FRACTIONAL H+**(the fractional amount of H+ in the plasma; -9999.00 is fill data; note that these three amounts may not add up to 1.0, in times of minute amounts of light ions the analysis may return small negative values for H+ and He+. These should be ignored.)**T**(the ion temperature in degrees K; -9999.0 is fill data)_{i}**T**(the electron temperature in degrees K; -9999.0 is fill data)_{e}**IDM #**(this is the number of measurements from the IDM averaged together to form the four-second average for Vy and Vz each; nominally there are 24 (6 per second) but it can drop to zero under disturbed conditions; this serves as a secondary quality flag for Vy and Vz)

These files are produced by a fortran program. If you wish to use the a fortran read statement to read your copy of these files, the format is:

101 format(0pf10.0,f8.1,2i2,f7.1,f8.2,f8.2,f8.2,f8.2,

$ 3f8.1,f8.2,2f8.1,1pe15.7,0p,3f9.2,2f7.0,i7)