HSD format 1.3 as of 20170725, support additional calibration block fields
Impact of the below change is that the additional cal fields will not be available, but the existing code is sufficiently forward compatible with the new block size.
allow different versions of calibration block to be made available based on length of block provided
examine using file format version in the main header as well
verify with pre-20170725 and post-20170725 HSD data files
""" Dear HimawariCast/HimawariCloud users,
The Japan Meteorological Agency (JMA) plans to modify its Himawari-8 ground processing system at 04:00 UTC on 25 July 2017 in order to improve the quality of Himawari-8 imagery and to update the Himawari Standard Data (HSD) format with the latest calibration coefficients in consideration of sensor sensitivity.
The modification will include:
- Reduction of banding and stripe noise
- Improvement of quantization noise
- Updating of the HSD format
Please see the the details below. http://www.data.jma.go.jp/mscweb/en/operation8/eventlog/Improvement_of_Himawari-8_data_quality.pdf http://www.data.jma.go.jp/mscweb/en/operation/calibration/hm8/CorrectionOfSensitivityTrend.pdf http://www.data.jma.go.jp/mscweb/en/himawari89/space_segment/hsd_sample/HS_D_users_guide_en_v13.pdf
Best regards, Satellite Program Division Japan Meteorological Agency """