Subject: [Sirgas-Mail] No.1632: igs08_1903.atx: Update including GLONASS-M satellite R853 From: Laura Sanchez This is a copy of [IGSMAIL-7323] igs08_1903.atx: Update including GLONASS-M satellite R853 Dear IGS colleagues! The absolute IGS antenna correction file (igs08_wwww.atx) has been updated. The new release is called ´igs08_1903.atx´. It contains the following changes: 1) According to the Information Analytical Centre (IAC), GLONASS-M satellite R853 (2016-032A) launched on 29 May 2016 replaced GLONASS-M satellite R723 in almanac slot 11 (Please note that R753 is a GLONASS satellite launched in 1991!). Therefore, the following satellite has been added: R11 (R853) The following PRELIMINARY phase center offset (PCO) values were assigned: PCO_X = -54.5 cm PCO_Y = 0.0 cm PCO_Z = 245.0 cm According to the Center for Orbit Determination in Europe (CODE), R853 is already active since 24 June 2016 (DOY 176). NAGU message 035-160627: > 035-160627 > REF: 033-160624 > SUBJ: 11/00 (753) PUT INTO OPERATION 27.06/1200 MT > 1.CONDITION: 11/00 (753) PUT INTO OPERATION 27.06/1200 MT (UTC+0300) https://www.glonass-iac.ru/en/CUSGLONASS/index.php 2) A decommission date for the following satellite has been added: R11 (R723): 23 June 2016 NAGU message 032-160624: > 032-160624 > NOTICE ADVISORY TO GLONASS USERS (NAGU) 032-160624 > SUBJ: TRANSFER TO THE RESERVE 11/00 (723) 24.06/0934-24.06/0934 MT > 1.CONDITION: 11/00 (723) TRANSFERRED TO THE RESERVE > SINCE 24.06/0934 UNTIL 24.06/0934 MT (UTC+0300) https://www.glonass-iac.ru/en/CUSGLONASS/index.php The updated antenna correction model is available at ftp://ftp.igs.org/pub/station/general/igs08_1903.atx or ftp://ftp.igs.org/pub/station/general/igs08.atx Many thanks to Stefan Schaer for his help! With best regards, Ralf Schmid on behalf of the IGS Antenna Working Group