More converters for sea-ice obs

[guillaumevernieres]

• This is mainly for seaice concentration, but we need to look at what else is available (skin temp for ex.)
• Even though there are 8 different instruments/platforms, we should be able to get away with fewer converters, some of the files structure seem exactly the same across platform/inst.

Copy/paste of @ilianagenkova 's README:

1.ABI-L2-AICEF
2.AMSR2_SEAICE_NH
3.AMSR2_SEAICE_SH  
4.JPSSRR_IceConcentration
5.MIRS_AMSU-MHS_IMG
6.MIRS_ATMS_IMG  
7.MIRS_GMI_IMG
8.MIRS_High_Resolution_IMG 

The sub names (directory) are as follows
1.EMC_ABI-L2-AICEF (PULL/ABI_L2_AICEF)
2.EMC_AMSR2_SEAICE_NH (NDE/AMSR2)
3.EMC_AMSR2_SEAICE_SH (NDE/AMSR2)
4.EMC_JPSSRR_IceConcentration (PULL/JPSSRR_IceConcentration)
5.EMC_MIRS_AMSU-MHS_IMG (PULL/MIRS_AMSU)

8.EMC_MIRS_High_Resolution_IMG (PULL/MIRS_High_Resolution_IMG)
7.EMC_MIRS_GMI_IMG (PULL/MIRS_GMI_IMG)
6a.EMC_MIRS_ATMS_IMG_J1 (PULL/MIRS_ATMS_IMG/J1)
6b.EMC_MIRS_ATMS_IMG_J2 (PULL/MIRS_ATMS_IMG/J2)
6c.EMC_MIRS_ATMS_IMG_SNPP (PULL/MIRS_ATMS_IMG/SNPP)

For (6) MIRS_ATMS_IMG, 
3 subs were created for each satellite because each satellite produces ~2600 files/day.
If files from all 3 satellites were in the same directory, retrieval would have been slow.

TODO:

• [x] document the list of retrieved parameters (ice concentration, ice temp, ...)
• [x] make sure all the intrument/platform provided by @ilianagenkova have at least seaice concentration as retrieved obs. Communicate to Iliana all the instruments/platforms that we want as part of the obs processing.
• [ ] design the converter(s)
  • [x] MIRS Instruments (NPP)
  • [ ] ABI Instruments
• [ ] test within a cycling experiment

[guillaumevernieres]

Acronym	Full Name	Description	Satellite	Instrument
ABI-L2-AICEF	Advanced Baseline Imager Level 2 Arctic Ice Extent Fraction	Provides high-resolution ice extent fraction data in the Arctic region.	GOES-R Series	Advanced Baseline Imager (ABI)
AMSR2_SEAICE_NH	Advanced Microwave Scanning Radiometer 2 Sea Ice Northern Hemisphere	Provides sea ice concentration and extent data for the Northern Hemisphere.	GCOM-W1	AMSR2
AMSR2_SEAICE_SH	Advanced Microwave Scanning Radiometer 2 Sea Ice Southern Hemisphere	Provides sea ice concentration and extent data for the Southern Hemisphere.	GCOM-W1	AMSR2
JPSSRR_IceConcentration	Joint Polar Satellite System Rapid Refresh Ice Concentration	Delivers rapid refresh ice concentration data from JPSS satellites.	JPSS Series	VIIRS
MIRS_AMSU-MHS_IMG	Microwave Integrated Retrieval System AMSU-MHS Imagery	Provides microwave imagery using data from AMSU and MHS instruments.	NOAA POES, MetOp	AMSU, MHS
MIRS_ATMS_IMG	Microwave Integrated Retrieval System ATMS Imagery	Provides microwave imagery using data from the ATMS instrument.	Suomi NPP, JPSS	ATMS
MIRS_GMI_IMG	Microwave Integrated Retrieval System GPM Microwave Imager	Provides microwave imagery using data from the GMI instrument.	GPM	GMI
MIRS_High_Resolution_IMG	Microwave Integrated Retrieval System High Resolution Imagery	Delivers high-resolution microwave imagery from various microwave instruments.	Various Satellites	Various Microwave Instruments