From peter.steigenberger at dlr.de Fri Jun 21 05:55:04 2019 From: peter.steigenberger at dlr.de (Peter Steigenberger) Date: Fri, 21 Jun 2019 14:55:04 +0200 Subject: [IGSMAIL-7785] Flex Power June 20 and 21, 2019 Message-ID: <7742c735-99ed-15d3-56c9-7665adbf3d31@dlr.de> Dear colleagues, based on carrier-to-noise density ratio observations (C/N0) of IGS receivers, we observed global flex power operations on June 20 and 21, 2019. Flex power started subsequently for all healthy Block IIR-M and IIF satellites on June 20 between 15:18 and 17:49 UTC. C/N0 of the P(Y)-code tracking increased by roughly 10 dB for all healthy Block IIR-M and IIF satellites whereas C/N0 of the C/A-code decreased by about 2-3 dB for the healthy IIR-M satellites only. The changes in power levels are similar to flex power mode III discussed in "Steigenberger P, Th?lert S, Montenbruck O. (2019) Flex power on GPS Block IIR-M and IIF, GPS Solutions, doi:10.1007/s10291-018-0797-8". All satellites returned to normal power levels on June 21 between 6:00 and 10:00 UTC. Best regards Peter -- ---------------------------------------------------- Peter Steigenberger Deutsches Zentrum f?r Luft- und Raumfahrt e.V. (DLR) German Space Operations Center Oberpfaffenhofen D-82234 Wessling Germany Tel. +49 (8153) 28-3765 Fax +49 (8153) 28-1450 e-mail peter.steigenberger at dlr.de ----------------------------------------------------