PALSAR-2 or ALOS-2 observation

Hello everyone, I made a post last week and I think I have the intuition the mentioned observation is a japanese satellite called ALOS-2 or DAICHI-2, but I’m not pretty sure. Can someone confirm if he has seen an observation predicted with orbitron and related to this satellite with a center frequency of 1231 MHz approx? I know the satellite has like 3 different selectable frequencies, and one of them is 1236 MHz, but with my algorithm it identifies it as 1231 MHz.
The other problem I have is that I can’t see the presence of the satellite previous to december, which drives me to think I may be commiting some mistake.
Thank you for your help!!