I use Sentinel 3 SLSTR and OLCI data in my applications. Often when running the application I end up using the NRT product since NTC isn’t available. I store the tile id for future use. I have noticed that for some older dates ( > 2022 - 23) where I had used products with NRT timeliness, the same products are no longer available on Copernicus Dataspace. What is the data retention duration of products with NRT timeliness? Are there are any tools / programs available to get the equivalent NTC product from the NRT product name? I store the product name in a string e.g. S3A_SL_1_RBT____20180222T094642_20180222T094942_20181005T234902_0179_028_136______LR1_R_NT_003.SEN3
To download the product I use the EODAG library in python.
Apart from Copernicus Dataspace, are there any other source that may save the NRT product?