Not supporting ASA_GM1 products

[Ciyel-real]

Hello,

I am currently working on Envisat product types 'ASA_IMM', 'ASA_WSM', 'ASA_APM' and 'ASA_GM1'. This module works perfectly for the first three and I thank you a lot for this but it won't open the ASA_GM1 products.

This is what I have as error:

unable to open "ASA_GM1_1PNDSI20060918_155919_000001572051_00197_23798_0000.N1"
Traceback (most recent call last):
File "process_patch.py", line 325, in
main()
File "process_patch.py", line 282, in main
product_lon_lat=get_lon_lat_array(N1_filepath)
File "process_patch.py", line 101, in get_lon_lat_array
file=epr.Product(file)
File "src/epr.pyx", line 2275, in epr.Product.cinit
ValueError: unable to open "ASA_GM1_1PNDSI20060918_155919_000001572051_00197_23798_0000.N1"

[avalentino]

Dear @Ciyel-real,
PyEPR is just a Python wrapper for the C-EPR-API so if the the product is supported by the C library it should also be supported by the Python one.

According to what I see in epr_dddb.c It seems to me that ASA_GM1 products should be supported.

Could you please provide a public link to one of the product that you are not able to open?
I would need to make some local test.

[Ciyel-real]

EN1_ODSI_ASA_GM1_1P_20060918T155925_20060918T160147_023798_0197_20190824T231510_v0100.ZIP

Hi,

Thanks for the answer.
Here is an ESA Eosip archive containing the .N1 and some xml files that may somehow be useful.

Best regards

[avalentino]

Dear @Ciyel-real,
thanks for the quick reply.
I can confirm the issue.
Looking at the data it seems that the have been produced with a SW version ("6.03") which is newer of the one supported by the EPR C-API (ASA_GM1_1P_602).

% head ASA_GM1_1PNDSI20060918_155919_000001572051_00197_23798_0000.N1 
PRODUCT="ASA_GM1_1PNDSI20060918_155919_000001572051_00197_23798_0000.N1"
PROC_STAGE=N
REF_DOC="PO-RS-MDA-GS-2009_4/C  "
                                        
ACQUISITION_STATION="PDHS-K              "
PROC_CENTER="DSI   "
PROC_TIME="24-AUG-2019 23:15:10.000000"
SOFTWARE_VER="ASAR/6.03     "
                                        
SENSING_START="18-SEP-2006 15:59:25.569967"

I would need to check the product specifications to understand if there is a change in the GM1 product and how, eventually, it could be integrated in the EPR C API.
Unfortunately I'm not able to find an updated version of the documentation.
Do you have a link to the product specification document for v6.03?