Subject: [SLR-Mail] No. 1112: ILRS Weekly Tracking Records From: Van S. Husson, ILRS Central Bureau > ******************************************************************************** SLR Electronic Mail 2003-08-12 09:12:00 UTC Message No. 1112 ******************************************************************************** Author: Van S. Husson, ILRS Central Bureau Subject: ILRS Weekly Tracking Records Dear Colleagues, Occasionally we get some emails from sites telling us they had a really good week of ranging and they were interested to know how their week compares to the BEST. This email should answer those questions. Thirteen months ago, we published a report on the weekly tracking records (reference: SLRMail#0962). We noted that tracking 200 passes in a week was a major accomplishment and required cooperation of the weather. Stations which achieved this milestone were listed. So consider this as an update. In SLRmail#0962, a few of the pass counts were slightly inflated due to an accounting error. Back then, I incorrectly assumed LEO normal point passes were not segmented (i.e. supplied in two or more parts). Since achieving the 200 passes/week has become more routine, we have raised the bar (5%) to 210 passes, which is exactly an average of 30 passes per day for 7 consecutive days. Here are the sites that achieved this performance bar (210 passes/week) and their number of occurrences (frequency) since January 1995. Time Span Sta# Location Freq yyyy-ww to yyyy-ww ---- -------------- ---- ------------------ 7110 Monument Peak 32 1997-19 to 2003-28 7090 Yarragadee 27 2002-05 to 2003-31 7839 Graz 12 1999-37 to 2003-12 7810 Zimmerwald 7 2002-30 to 2003-31 7840 Herstmonceux 6 2002-14 to 2003-12 7849 Mt. Stromlo 3 1999-16 to 2000-31 7105 Greenbelt 1 2002-32 to 2002-32 Below is the top ten all time BEST tracking weeks. Please note that two sites were within 15 passes of averaging 50 passes/week (WOW!). Week Sta# Location yyyy-ww Passes Comments ---- -------------- ------- ------ --------------------- 7839 Graz 2003-08 337 >48 passes/week 7090 Yarragadee 2003-09 335 almost 48 passes/week 7810 Zimmerwald 2003-08 325 7090 Yarragadee 2003-24 311 7810 Zimmerwald 2003-28 310 265 of these in 2 colors 7090 Yarragadee 2003-10 284 7110 Monument Peak 2003-26 282 >40 passes/week 7090 Yarragadee 2002-08 279 7090 Yarragadee 2002-06 276 7810 Zimmerwald 2003-12 274 To include a few more sites not mentioned above that should receive honorable mention by averaging 25 passes a day for 7 days (i.e. >=175 passes/week) since 1995 are: Week Sta# Location yyyy-ww Passes Comments ---- -------------- ------- ------ ------------------------- 7843 Orroral 1995-32 209 8834 Wettzell 2003-22 207 7501 Hartebeesthoek 2002-28 205 7237 Changchun 2002-49 199 Only ranges at night 7832 Riyadh 2003-25 199 From: ”Husson, Van” ********************************************************************************