Clarification on number of object Ids

As per the dataset information provided in paper and on EvalAI website, the public training dataset comprises of 500 simulated satellite trajectories.
Is it correct to assume that each CSV file corresponds to 6 month 2 hour temporal resolution observations of each of the satellites?
If it is so, the number of Object Ids should be 500, but I see only 250.

Please help me clarify this confusion.


We have not uploaded the full training set yet, more data will come in the future.

Best regards,