For the good start

NOAA-15 137,620 MHz

NOAA-18 137,9125 MHz

NOAA-19 137,100 MHz

Example of tracker for NOAA-19

Max altitude signal image for NOAA-18 @ 137,9125 MHz 20:34 UTC 23-05-2025; elevation +80,4

Very first pics (using of SatDump v1.2.2) received in offline processing