只是开始从文本头文件移动到各种传感器的jsons。这是许多中的第一个。
我创建了一个描述二进制数据文件结构的json。 基本格式为：varName：[startByte，长度，“数据类型”，“描述”]。 但是，某些startByte值取决于早期的变量。因此，“变量”。也许有一个名词？
在下面json的底部附近，有一些var，其startByte类似于var：Obj.var 我将解析它们，从数据文件中读取值，并按照指示的数学方法得出实际值。
虽然可行，但似乎其他人以前可能已经处理过。还有更标准的解决方案吗？这样的变量有术语吗？
{
"Meta": {
"Source": "ASD File Format version 8 rev B",
"Format": ["Start byte", "Length in bytes", "Datatype", "Description" ],
"Datatypes": "Float and integer follows the pattern [u][int|flt]NumberOfBytes. Ex: a long would be int8. Other types, all are 1 byte: str (string), pad (padding), oct, hex, bool, and unk (unknown)."
},
"Header": {
"co": [ 0, 3, "str", "File Version - as6" ],
"comments": [ 3, 157, "str", "Comments" ],
"when": [ 160, 18, "uint2", "Time when spectrum was saved. Sec, min, hour, mday, mon (0-11), year, wday, yday, isDST" ],
"program_version": [ 178, 1, "uint1", "Major in upper nibble, minor in lower" ],
"file_version": [ 179, 1, "uint1", "Spectrum file format version" ],
"itime": [ 180, 1, "uint1", "Not used after v2.00" ],
"dc_corr": [ 181, 1, "uint1", "1 if DC subtracted, 0 if not" ],
"dc_time": [ 182, 4, "uint4", "Time of last dc, seconds since 1970.01.01" ],
"data_type": [ 186, 1, "uint1", "0=RAW, 1=REF, 2=RAD, 3=NOUNITS" ],
"ref_time": [ 187, 4, "uint4", "Time of last wr, seconds since 1970.01.01" ],
"ch1_wavel": [ 191, 4, "flt4", "Calibrated starting waveleng (nm)" ],
"wavel_step": [ 195, 4, "flt4", "Calibrated wavelength step (nm)" ],
"data_format": [ 199, 1, "uint1", "Format of spectrum" ],
"old_dc_count": [ 200, 1, "uint1", "Num of DC measurements in the avg" ],
"old_ref_count": [ 201, 1, "uint1", "Num or WR in the average" ],
"old_sample_count": [ 202, 1, "uint1", "Num of spec samples in the avg" ],
"application": [ 203, 1, "uint1", "Which application created the APP_DATA" ],
"channels": [ 204, 2, "uint2", "Num of channels in the detector" ],
"app_data": [ 206, 128, "unk", "Application specific data. No further info available." ],
"gps_data": [ 334, 56, "unk", "GPS position, course, etc. Possible error in manual. 58B described, but only 56B available." ],
"it": [ 390, 4, "uint4", "Actual integration time in mS." ],
"fo": [ 394, 2, "uint2", "The fo attachment's view in degrees." ],
"dcc": [ 396, 2, "uint2", "Dark current corretion value." ],
"calibration": [ 398, 2, "uint2", "Calibration series." ],
"instrument_num": [ 400, 2, "uint2", "Instrument number." ],
"ymin": [ 402, 4, "flt4", "Setting of the y axis min value." ],
"ymax": [ 406, 4, "flt4", "Setting of the y axis max value." ],
"xmin": [ 410, 4, "flt4", "Setting of the x axis min value." ],
"xmax": [ 414, 4, "flt4", "Setting of the x axis max value." ],
"ip_numbits": [ 418, 2, "uint2", "Instrument dynamic range." ],
"xmode": [ 420, 1, "uint1", "X axis mode." ],
"flags": [ 421, 4, "uint1", "Flags[0]=AVGFIX'ed, Flags[1]: vnir saturation=1, swir1 saturation=2, swir2 saturation=3, Tec1 alarm=8, Tec2 alarm=16." ],
"dc_count": [ 425, 2, "uint2", "Num of DC measurements in the avg." ],
"ref_count": [ 427, 2, "uint2", "Num of WR in the average." ],
"sample_count": [ 429, 2, "uint2", "Num of spec samples in the avg." ],
"instrument": [ 431, 1, "uint1", "Instrument type. Byte 0=Unknown, 1=PSII, 2=LSVNIR, 3=FSVNIR, 4=FSFR, 5=FSNIR, 6=CHEM, 7=FSFR_unattended." ],
"bulb": [ 432, 4, "uint4", "ID number of the cal bulb." ],
"swir1_gain": [ 436, 2, "uint2", "Gain setting for swir 1." ],
"swir2_gain": [ 438, 2, "uint2", "Gain setting for swir 2." ],
"swir1_offset": [ 440, 2, "uint2", "Offset for swir 1." ],
"swir2_offset": [ 442, 2, "uint2", "Offset for swir 2." ],
"splice1_wavelength": [ 444, 4, "flt4", "Wavelength of VNIR and SWIR1 splice." ],
"splice2_wavelength": [ 448, 4, "flt4", "Wavelength of SWIR1 and SWIR2 splice." ],
"SmartDetectorType": [ 452, 27, "flt4", "Data for OL731 device." ],
"spare": [ 479, 5, "pad", "Fill to 484 bytes."]
},
"SpectrumData": {
"Spectrum": [ 485, "var:Header.channels", "flt8", "Spectrum data to size of channels." ]
},
"ReferenceFileHeader": {
"meta": {
"position": "var:SpectrumData.Spectrum[1] + 1",
"size": "unk",
"end": "var:ReferenceFileHeader.meta.position + ReferenceFileHeader.meta.size + 1"
},
"ReferenceFlag": [ "var:meta.end + 1", 2, "bool", "Reference been taken." ],
"ReferenceTime": [ "var:meta.end + 1 + 3", 8, "date", "Time reference was taken." ],
"SpectrumTime": [ "var:meta.end + 1 + 11", 8, "date", "Time spectrum was taken." ],
"SpectrumDescription": [ "var:meta.end + 1 + 19", "var", "str", "Description of spectrum."]
}
}