Recent flex power changes

Abstract The redistribution of the transmit power among different GPS signal components is called flex power, and it implemented on modernized satellites starting with Block IIR-M. purpose to increase protection against jamming. It has been mostly active since beginning 2017 in modes visible carrier-to-noise density ratio (C/N 0 ) observations as stepwise changes. Especially after 2020, changed frequently. We summarize these changes study their impact differential code biases (DCBs) which 0.3 ns average for L1 L2 intra-frequency DCBs. analyzed daily using C/N measurements globally distributed GNSS network from January 1, 2020 until February 28, 2022. activation times are written into a dedicated block SINEX metadata format.