Browse Plots

In addition to the Magnetometer (MAG), Electron Reflectometer (ER), and ancillary data files, this disk contains graphical browse plots which summarize some of the MAG and ER data. These plots are in GIF87A format. They are contained in the BROWSE directory in one-month subdirectories.

Each browse file contains plots of the following items for a 12-hour period: electron count rate (at various energies); electron energy spectrum; magnetic field, as magnitude |B| and direction (phi, theta); polarity; and Sun sensor data. The data are plotted against two time scales (decimal day-of-year and hour-minute) and a scale of GSE longitude.

The naming convention for these files is illustrated by the following example. (The file mentioned here is only an example; there are many such files on the disk.)

9909112.GIF is interpreted as

99 = year 1999
091 = day of year 091 (that is, April 1)
12 = start time 1200 (in 24-hour time; 00 minutes is implied)
GIF = file in GIF format.

9909112.LBL is the name of the PDS label file which describes the data file 9909112.GIF. Such label files provide descriptive information about the data files in a format which is both human-readable and machine-readable.

Links to Data and Browse Files

The following links can be used to navigate the browse files on this disk. Note that there are two browse plots per day of data: one beginning at 0000 hours, the other beginning at 1200 hours.

Links to plots for: April 1999 | May 1999 | June 1999 | July 1999