Problem decoding BDS 4,5 reserved bits

[tmartincevic]

There is an error thrown when decoding BDS 4,5. Looks like hex encoding is not happy with the reserved field of length 5 (bits 13 to 9). The error goes away if I remove encode="hex" from line 313 in asterix_bds.xml. Also, if I shorten the reserved field from 5 to 4 bits, hex encoding no longer complains. Here is the output and packet capture:

ERROR:   Nov 12 19:48:01 2020 (asterixformat.cxx) Hex representation not valid
{"id":1,
"length":13,
"crc":"687A89B4",
"timestamp":1999304,
"hexdata":"3000108120D27D010071FC400235C045",
"CAT048":{
        "I010":{
                "SAC":210,
                "SIC":125},
        "I250":[{
                "STATUS_TURBULENCE":0,
                "TURBULENCE":0,
                "STATUS_WIND_SHEAR":0,
                "WIND_SHEAR":0,
                "STATUS_MICROBURST":0,
                "MICROBURST":0,
                "STATUS_ICING":1,
                "ICING":3,
                "STATUS_WAKE_VORTEX":0,
                "WAKE_VORTEX":0,
                "STATUS_STATIC_AIR_TEMPERATURE":1,
                "STATIC_AIR_TEMPERATURE":-3.7500000,
                "STATUS_AVERAGE_STATIC_PRESSURE":0,
                "AVERAGE_STATIC_PRESSURE":0.0000000,
                "STATUS_RADIO_HEIGHT":1,
                "RADIO_HEIGHT":6880.0000000,
                "RESERVED":"???",
                "BDS":"45"}]}}

bds-45.zip

[dsalantic]

You are right, that was a problem in BDS 4.5 definition. There is no need to encode reserved filed in hex.
Thanks