This plot shows the along track difference between the December 31, 1998, version 1 and version 3 ephemeris files verses the time in minutes from January 1, 1999, at zero hundred hours GMT. The X axis goes from -5 minutes to plus 20 minutes. The Y axis goes from minus 15 to plus 5 kilometers. The plot line starts at X equals minus 3 minutes and Y equals plus one half kilometer. The plot line runs roughly horizontal until X equals minus 1 minute. It then drops steeply to minus 15 kilometers at X equals plus 1 minute. The plot line runs roughly horizontal until X equals plus 9 minutes. It then rises steeply to minus 7 kilometers at X equals plus 10 minutes. The plot line runs roughly horizontal until it's end at X equals plus 18 minutes.
This plot shows the along track difference between the March 15, 2000, version 1 and version 2 ephemeris files verses the time in hours from March 15, 2000, at zero hundred hours GMT. The X axis goes from 0 to plus 40 hours. The Y axis goes from 0 to plus 2 kilometers. The plot line starts at X equals plus 17.5 hours and Y equals 0 kilometers. It then rises steeply to plus 1.8 kilometers at it's end at X equals plus 34 hours.
This plot shows the along track difference between the November 23, 2000, version 1 and the November 24, 2000, version 1 and version 2 ephemeris files verses the time in hours from November 24, 2000, at zero hundred hours GMT. The X axis goes from 0 hours to plus 40 hours. The Y axis goes from 0 to plus 5 kilometers. The plot line for November 23 version 1 verses November 24 version 1 starts at X equals 0 hours and Y equals plus 2.5 kilometers. The plot line drops to Y equals 1 kilometer at X equals 15 hours and then rises to Y equals 5 kilometers at X equals 34 hours. The curve is parabolic shaped. The plot line for November 23 version 1 verses November 24 version 2 starts at X equals 0 and Y equals 0.1 kilometers. It then gradually rises to Y equals 4 kilometers at X equals 34 hours. The curve is very flat, fairly close to a straight line.
This plot shows the along track difference between the November 23, 2000, version 2 and the November 24, 2000, version 1 and version 2 ephemeris files verses the time in hours from November 24, 2000, at zero hundred hours GMT. The X axis goes from 0 hours to plus 40 hours. The Y axis goes from minus 0.5 to plus 2.5 kilometers. The plot line for November 23 version 2 verses November 24 version 1 starts at X equals 0 hours and Y equals plus 2.5 kilometers. The plot line drops to Y equals minus 0.1 kilometers at X equals 19 hours and then rises to Y equals 1.8 kilometers at X equals 34 hours. The curve is parabolic shaped. The plot line for November 23 version 2 verses November 24 version 2 starts at X equals 0 and Y equals 0.1 kilometers. It then gradually drops to Y equals minus 0.1 kilometers at X equals 11 hours and then rises to Y equals 0.7 kilometers at X equals 34 hours. The curve is very flat, fairly close to a straight line.
This plot shows the along track difference between the November 23, 2000, version 3 and the November 24, 2000, version 1 and version 2 ephemeris files verses the time in hours from November 24, 2000, at zero hundred hours GMT. The X axis goes from 0 hours to plus 40 hours. The Y axis goes from minus 1 to plus 4 kilometers. The plot line for November 23 version 3 verses November 24 version 1 starts at X equals 0 hours and Y equals plus 2.4 kilometers. The plot line drops to Y equals plus 0.2 kilometers at X equals 16 hours and then rises to Y equals 3.1 kilometers at X equals 34 hours. There is a non-continuous jump in the curve of minus 0.7 kilometers in the Y direction at X equals plus 30 hours. The plot line immediately jumps back to where it was so there appears to be only one non-continuous point. The curve is parabolic shaped. The plot line for November 23 verses version 3 November 24 version 2 starts at X equals 0 and Y equals 0 kilometers. It then gradually rises to Y equals 2 kilometers at X equals 34 hours. There is a non-continuous jump in the curve of minus 0.7 kilometers in the Y direction at X equals plus 30 hours. The plot line immediately jumps back to where it was so there appears to be only one non-continuous point. The curve is very flat, fairly close to a straight line.
This plot shows the along track difference between the November 24, 2000, version 1 and version 2 and the November 25, 2000, ephemeris files verses the time in hours from November 25, 2000, at zero hundred hours GMT. The X axis goes from 0 hours to plus 10 hours. The Y axis goes from minus 0.2 to plus 1 kilometers. The plot line for November 24 version 1 verses November 25 starts at X equals 0 hours and Y equals plus 0.05 kilometers. The plot line drops to Y equals minus 0.1 kilometers at X equals 10 hours. The curve is a straight line with a sine wave superimposed upon it corresponding to per orbit fluctuations. The plot line for November 24 version 2 verses November 25 starts at X equals 0 and Y equals 0 kilometers. It then gradually rises to Y equals plus 0.95 kilometers at X equals 10 hours. The curve is very flat, fairly close to a straight line with a sine wave superimposed upon it corresponding to per orbit fluctuations.
This plot shows the along track difference between the April 4, 2001, and the April 5, 2001, version 1 and version 2 ephemeris files verses the time in hours from April 5, 2001, at zero hundred hours GMT. The X axis goes from 0 hours to plus 10 hours. The Y axis goes from minus 2 to plus 1 kilometers. The plot line for April 4 verses April 5 version 1 starts at X equals 0 hours and Y equals minus 2 kilometers. The plot line rises to Y equals minus 0.2 kilometers at X equals 10 hours. The curve is a straight line with a sine wave superimposed upon it corresponding to per orbit fluctuations. The plot line for April 4 verses April 5 version 2 starts at X equals 0 and Y equals plus 0.1 kilometers. It then drops to Y equals minus 0.2 kilometers at X equals 5 hours and then rises to Y equals 0 kilometers at X equals 10 hours. The curve is very flat, fairly close to a straight line with a sine wave superimposed upon it corresponding to per orbit fluctuations.
This plot shows the along track difference between the March 31, 2001, and the April 1, 2001 ephemeris files verses the time in hours from April 1, 2001, at zero hundred hours GMT. The X axis goes from 0 to plus 12 hours. The Y axis goes from minus 2 to plus 0.5 kilometers. The plot line starts at X equals 0 hours and Y equals plus 0.4 kilometers. The plot line drops nearly linearly to Y equals minus 1.9 kilometers at X equals plus 10 hours. The plot line has superimposed on it a sine wave with amplitude 0.2 kilometers corresponding to per orbit fluctuations.
This plot shows the radial difference between the March 31, 2001, and the April 1, 2001 ephemeris files verses the time in hours from April 1, 2001, at zero hundred hours GMT. The X axis goes from 0 to plus 12 hours. The Y axis goes from minus 0.1 to plus 0.15 kilometers. The plot line is a sine wave with an amplitude of 0.08 kilometers. The sine wave is offset by Y equals 0.03 kilometers at X equals 0 hours and rises nearly linearly to an offset of Y equals 0.07 kilometers at X equals plus 10 hours. The sine wave is due to per orbit fluctuations. The plot line starts just prior to the peak of the sine wave so at Y equals plus 0.09 kilometers at X equals 0 hours.