| Date: | 2001-08-10 08:20:00 | |
| Sender: | NASDA GUTS-SLR Team <Takashi.Uchimura <uchimura@eoc.nasda.go.jp>> | |
| Subject: | [SLR-Mail] No. 798: LRE rehearsal results | |
| Author: | NASDA GUTS | |
| Content: | ******************************************************************************** SLR Electronic Mail 2001-08-10 08:20:00 UTC Message No. 798 ******************************************************************************** Author: NASDA GUTS-SLR Team Subject: LRE rehearsal results Dear colleagues, Thank you for participated in LRE rehearsal that is tracked dummy target ”VEP”. We have confirmed the appropriateness of our TIRVs, its interface and SLR station´s optical tracking capability. As results, We have no problem in generated TIRVs procedure and its accuracy in this rehearsal. We got tracking report from 5 stations as attached below. If your station tracked VEP and yet sending no report, Please report us tracking summary. In the real operation for LRE, we need a tracking information report as soon as after the end of possible break of your tracking session. For stations which was not enough time to prepare tracking, we will update TIRVs of VEP by 17th Aug on the WWW (http://god.tksc.nasda.go.jp). We generated TIRVs of VEP that is based on the orbital element using optical observation data that was acquired in Japan in this rehearsal. This method also uses to generate TIRVs in the LRE launch operation as a back up of SLR. Since the weather condition in this season is very unstable in Japan, it may not to be able to do the optical observation. We are asking all of the SLR stations to obtain SLR data of LRE. And especially, we indispensable need SLR data that is acquired by near North American stations in the 1st AOS of real launch especially. We will determine orbit of LRE using SLR data obtained by North American stations. It must be connected to 2nd visibility of Europe, and third visibility of western pacific area. Best regards, Takashi Uchimura _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ Flight Dynamics Group Satellite Mission Operations Department Office of Satellite Technology,Research and Applications National Space Development Agency of JAPAN _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ ----Tracking report from each station ---- (1) MOBLAS-5 Visible Acquired Time: 8/8 15:09-15:15Z Az: 3.2 to 7.7 El: 41.7 to 39.8 IRV used: (EPH number 8) Offset along track: -15 mil to -10 mil Offset across track: +10 mil constant Visibility Magnitude : Started out dim with integrator on and went to dull. It could just be seen without the integrator on but not at the end of this viewing session. Detail offset record of LRE when centered on your field of view.(if available) Epoch UTC, El along across range visibility 15:05:00 41.7 -15 mil +10 mil 85,000usec dim 15:09:00 41.1 -15 mil +10 mil 95,000usec dim 15:12:00 40.5 -15 mil +10 mil 100,000usec dull 15:15:00 39.8 -10 mil +10 mil 106,000usec dull Visible Acquired Time: 8/9 15:09-15:15Z Az: 292 El: 52 IRV used: (EPH number 9) Offset along track: -280 mil Offset across track: -160 mil Visibility Magnitude : 1 to 2 , very easy to see BUT only just saw it at first as it was very low in EL and left on screen in AZ. Detail offset record of LRE when centered on your field of view.(if available) Epoch UTC, El along across range visibility 11:45:00 52.0 -280 mil -160 mil 15,400usec very bright (2) Mt.Stromlo Visible Acquired Time: 14:40-14:50 Az: approx 290 El: approx 5-7 IRV used: EOS generated from TLEs Offset along track: -5.5 seconds time bias Offset across track: -5 arcmin Visibility Magnitude : 12 Sky very cloudy, satellite visible between clear patches. Visible Acquired Time: 12:10 - 12:45 Az: 359-15 El: 36-30 IRV used (File Name) slrirv.LRE_20010808_009_0.NSD Offset along track 0 arcsec Offset across track 0 arcsec Visibility Magnitude : 11-13 Detail offset record of LRE when centered on your field of view.(if available) Epoch UTC, Az El (approx) 12:13 359.7 36.2 12:19 5.3 34.8 12:23 8.3 33.8 12:27 10.2 33.0 12:30 11.9 32.2 12:33 12.9 31.6 12:37 14.0 31.0 12:43 15.4 30.0 (3) Haleakala Visible Acquired Time: 11:00-12:00 Aug 7 UT Az:71-66 El:57-65 IRV used: #07 Offset along track: Offset across track: Visibility Magnitude: 12-13 Detail offset record of LRE when centered on your field of view. (If available) Visible Acquired Time: 12:00-12:30 Aug 8 UT Az:70 El:32-25 IRV used: #08 Offset along track: Offset across track: Visibility Magnitude: 12 Detail offset record of LRE when centered on your field of view. (If available) (4) MOBLAS-7 Visible Acquired Time: 04:25-05:25 AZ:189-173 Deg. EL: 30-59 Deg. IRV used: EPH 8 Ofsset along track:+72mdeg. Offset across track:-12mdeg. Visibility Magnitude:11 or larger, very faint, sky was very hazy. Note:Seen first at -52 mDeg in AZ and +13 mDeg in EL First acquisition window 04:25-04:30 UTC 189 Deg AZ 39 Deg EL Second Acquisition window 04:45-04:58 UTC (obtained bias offsets), +20 mDeg AZ +1 mDeg EL 179 Deg AZ 50 Deg EL Third acquisition window 05:18-05:25 UTC 173 Deg AZ 59 Deg EL Videotaped the three events. From: ”Takashi.Uchimura” ******************************************************************************** |