| Date: | 2000-02-02 08:45:00 | |
| Sender: | Van Husson, ILRS Central Bureau <Van S. Husson <dsgvsh@slral2.atsc.allied.com>> | |
| Subject: | [SLR-Mail] No. 544: 4th Quarter 1999 Global Performance Report Card | |
| Author: | Van Husson, ILRS Central Bureau | |
| Content: | ******************************************************************************** SLR Electronic Mail 2000-02-02 08:45:00 UTC Message No. 544 ******************************************************************************** Author: Van Husson, ILRS Central Bureau Subject: 4th Quarter 1999 Global Performance Report Card The 4th quarter 1999 global performance card is not available from the ILRS Web Site at http://ilrs.gsfc.nasa.gov/perf_99q4.html . The following are new features to this particular report card: 1. True pass counts (all satellites) versus pass segments counts. See Note A below for more explanation. 2. NP totals in addition to pass counts for LEO, LAGEOS, and High Satellites. 3. Navigation bars added at the top of each report card to easily surf from one report card to another to easily compare present with past performances. 4. The gifs are hopefully more readable despite being reduced in size (480 x 640 pixels) to enabling printing the charts using different paper sizes and different page layouts. Note A: In all previous report cards the pass totals reflected how many individual NP pass segments were supplied by a station. A pass segment begins with 99999 followed by a header record followed by one of more normal point data records. For instance, station 7105 (Greenbelt) may have provided two distinct pass segments for a GLONASS pass even though these 2 distinct pass segments may have actually came from the same GLONASS pass (i.e., same revolution of the satellite). In previous report cards, stations were given credit for every pass segment even though they may have been from the same pass. Now, stations will only be given credit for ”true” passes, but normal point totals are now included to provide a better insight into system performance. Please send any comments/suggestions to Van Husson at dsgvsh@slral2.atsc.allied.com From: ”Van S. Husson” ******************************************************************************** |