From schmid at tum.de Wed Apr 15 06:35:04 2015 From: schmid at tum.de (Ralf Schmid) Date: Wed, 15 Apr 2015 15:35:04 +0200 Subject: [IGSMAIL-7082] igs08_1840.atx: Update including reactivated GLONASS-M satellite R714 Message-ID: <552E6908.8020406@tum.de> Dear IGS colleagues! The absolute IGS antenna correction file (igs08_wwww.atx) has been updated. The new release is called 'igs08_1840.atx'. It contains the following changes: 1) According to the Information-Analytical Centre, GLONASS-M satellite R714 was reactivated utilizing almanac slot 17. Therefore, the following satellite has been added: R17 (R714) NAGU message 012-150415: > NOTICE ADVISORY TO GLONASS USERS (NAGU) 012-150415 > SUBJ: 17/-6 (714) PUT INTO OPERATION 15.04/0825 MT > 1.CONDITION: 17/-6 (714) PUT INTO OPERATION 15.04/0825 MT (UTC+0300) http://glonass-iac.ru/en/CUSGLONASS/index.php According to CODE analyses, the switch from R746 to R714 already took place on 12/13 April 2015 (DOY 102/103). 2) Decommission dates for the following satellites have been added: G08 (G038): 13 April 2015 R17 (R746): 12 April 2015 Although officially removed from the GPS constellation on 26 March 2015, Block IIA satellite SVN38/PRN08 didn't stop signal transmission before 13 April 2015 (DOY 103) according to the IGS tracking statistics provided by CODE (ftp://ftp.unibe.ch/aiub/igsdata/odata_gnss_day.txt). NANU message 2015021: > NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015021 NANU TYPE: GENERAL > *** GENERAL MESSAGE TO ALL GPS USERS *** > SUBJ: SVN38 (PRN08) DECOMMISSIONING JDAY 085/2200 > 1. NANU TYPE: GENERAL > NANU NUMBER: 2015021 > NANU DTG: 262242Z MAR 2015 > REFERENCE NANU: 2015003 > REF NANU DTG: 021712Z JAN 2015 > SVN: 38 > PRN: 08 > UNUSABLE START JDAY: 303 > UNUSABLE START TIME ZULU: 1500 > UNUSABLE START CALENDAR DATE: 30 OCT 2014 > DECOMMISSIONING JDAY: 085 > DECOMMISSIONING TIME ZULU: 2200 > DECOMMISSIONING CALENDAR DATE: 26 MAR 2015 > > 2. CONDITION: GPS SATELLITE SVN38 (PRN08) WAS UNUSABLE AS OF JDAY 303 (30 OCT 2014) > AND REMOVED FROM THE GPS CONSTELLATION ON JDAY 085 (26 MAR 2015). http://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2015021 NAGU message 011-150415: > NOTICE ADVISORY TO GLONASS USERS (NAGU) 011-150415 > REF: 010-150413 > SUBJ: 17/04 (746) UNDER CHECK BY THE SPC SINCE 15.04/0825 MT > 1.CONDITION: 17/04 (746) UNDER CHECK BY THE SPC SINCE 15.04/0825 MT (UTC+0300) http://glonass-iac.ru/en/CUSGLONASS/index.php 3) One robot calibration provided by Javad GNSS Inc. has been added: JAV_RINGANT_G3T JAVC The updated antenna correction model is available at ftp://ftp.igs.org/pub/station/general/igs08_1840.atx or ftp://ftp.igs.org/pub/station/general/igs08.atx Thanks to Stefan Schaer and Richard Langley for their help! With best regards, Ralf Schmid on behalf of the IGS Antenna Working Group