| Date: | 2005-05-31 08:51:00 | |
| Sender: | Toshimichi Otsubo, NICT Kashima <Toshimichi Otsubo <otsubo@nict.go.jp>> | |
| Subject: | [SLR-Mail] No. 1334: NICT bias report upgraded | |
| Author: | Toshimichi Otsubo, NICT Kashima | |
| Content: | ******************************************************************************** SLR Electronic Mail 2005-05-31 08:51:00 UTC Message No. 1334 ******************************************************************************** Author: Toshimichi Otsubo, NICT Kashima Subject: NICT bias report upgraded Dear ILRS Colleagues, Starting from this week, the analysis software and strategy used for multi-satellite pass-by-pass bias reports are replaced at NICT, an associate analysis center of ILRS. - MORE FREQUENT The QC report is now generated EVERY DAY, covering the past 14 days. The daily reports are available from http://www.nict.go.jp/ka/control/slr/bias/ usually updated before 12h JST (= 3h GMT). The file name of daily report is: http://www.nict.go.jp/ka/control/slr/bias/YYYY/YYYYMMDD-14d.txt where YYYY = 4-digit year, MM = 2-digit month and DD = 2-digit day. The daily reports from 1 Jan 2005 are already available there. Note that we distribute them WEEKLY (Wednesday) via the SLReport mailing list as we currently do. The first one is emailed tomorrow. - MORE ACCURATE The Java-written analysis software ´concerto´ is upgraded from ´v3´ to ´v4´. The new ´v4´ is compatible to IERS Conventions 2003, and is equipped with better numerical computation algorithms. The ITRF2000 coordinates are used for most stations, but newly adjusted values are used for new or improved stations. - MORE STABLE The criteria for estimating a range bias and a time bias are set higher, i.e. only a range bias is calculated for a short (or a-few- point-made) pass. - MORE SATELLITES In addition to the on-going 7 satellites (LAGEOSx2, ETALONx2, AJISAI, STARLETTE and STELLA), analysis of GLONASS, GPS and some LEOs is being tested. When the data amount and the analysis result meet certain criteria, the bias estimates will be included in the reports. - NO CHANGE IN FORMAT The format of the reports remains the same as the current ones. Due to this change, there might be discontinuity in the bias values, but it should be very small for core stations. Your comments and suggestions are always welcome. Best Regards, Toshi ----- Toshimichi Otsubo Kashima Space Research Center National Institute of Information and Communications Technology phone +81-299-84-7189 facsimile +81-299-84-7160 From: Toshimichi Otsubo ******************************************************************************** |