NASA Ocean Color

ocssw V2022
 #ifndef IAS_CONST_H
 #define IAS_CONST_H
  
 #ifndef TRUE
 #define TRUE  1
 #endif
  
 #ifndef FALSE
 #define FALSE 0
 #endif
  
 #define SUCCESS  0
 #define ERROR   -1
 #define WARNING -2
  
 /* Put IAS-specific constants here. */
 #define IAS_DAYS_IN_YEAR        365
 #define IAS_DAYS_IN_LEAP_YEAR   366              /* Number of days per year
                                                      (+1 for leap years) */
 #define IAS_SOFTWARE_VERSION_SIZE 11
 #define IAS_INSTRUMENT_SOURCE_SIZE 32
 #define IAS_BAND_NAME_SIZE 30
 #define IAS_COLLECT_TYPE_SIZE 50
  
 #define IAS_EPOCH_2000      2451545.0       /* Julian date of epoch 2000    */
 #define IAS_JULIAN_CENTURY  36525.0         /* Julian century */
  
 #define IAS_SEC_PER_DAY     86400                /* Seconds Per Day */
 #define IAS_DAILY_SECONDS_IN_LEAP_YEAR 86401     /* Number of seconds per day
                                                      (+1 to account for leap
                                                      seconds) */
  
 /*
  * GPS epoch year.  1970 was chosen to support DOQ GCPs that have slightly bogus
  * dates of 7/1/1970
  */
 #define IAS_MIN_YEAR 1970
  
 #define IAS_MAX_YEAR 2099
 #define IAS_MAX_MONTH 12
 #define IAS_MIN_MONTH 1
  
 /* Length of the composite IAS sensor name "L8_OLITIRS" */
 #define IAS_SENSOR_NAME_LENGTH 11
  
 /* Size of the composite IAS sensor ID "OLI_TIRS",
    including null terminator */
 #define IAS_SENSOR_ID_SIZE 9
  
 /* Length of the satellite name "Landsat_8" */
 #define IAS_SPACECRAFT_NAME_LENGTH 10
  
 #define IAS_MODIFIED_JULIAN_DATE 2400000.5
 /* The Modified Julian Date Constant Modified Julian Date = FullJuilanDate -
  * MDJ (where FullJulianDate is a running day count since Jan 1 4713 B.C. */ 
  
 /* define some constants related to projection definitions */
 #define IAS_UNITS_SIZE 12
 /* maximum size of the units string (i.e. METERS, FEET, etc) */
  
 #define IAS_DATUM_SIZE 16
 /* maximum size of the datum name string */
  
 #define IAS_PROJ_PARAM_SIZE 15
 /* size of the array for holding projection parameters */
  
 #define IAS_WORKORDER_ID_LENGTH 12
 /* length of a Work Order ID */
 #define IAS_WORKORDER_ID_SIZE (IAS_WORKORDER_ID_LENGTH + 1)
 /* size of a Work Order ID string, including null terminator */
  
 #define IAS_PRODUCT_REQUEST_ID_LENGTH 20
 /* length of a Product Request ID */
 #define IAS_PRODUCT_REQUEST_ID_SIZE (IAS_PRODUCT_REQUEST_ID_LENGTH + 1)
 /* size of a Product Request ID string, including null terminator */
  
 #define IAS_CHAR_ID_LENGTH 20
 /* length of a characterization ID */
 #define IAS_CHAR_ID_SIZE (IAS_CHAR_ID_LENGTH + 1)
 /* size of a characterization ID string, including null terminator */
  
 /* RPS report header string sizes (include NULL terminator) */
 #define IAS_DIFFUSER_TYPE_SIZE           9
 #define IAS_BIAS_MODEL_TYPE_SIZE        11
  
 /* Number of points to use in Lagrange interpolation */
 #define IAS_LAGRANGE_PTS 4
  
 /* Number of values in the LOS LEGRENDRE Coefficeint arrays */
 #define IAS_LOS_LEGENDRE_TERMS 4
  
  /* If roll angle is this far from 0 degrees, call it off-nadir */
 #define IAS_OFF_NADIR_BOUNDARY 0.5
  
 /* Macro to determine odd/even image data lines.  The convention assumed
    here is that line index 0 is an "odd" line, line index 1 is an "even"
    line, etc.  This convention applies to both radiometric and geometric
    processing.
  
    This is needed for radiometric processing of the OLI PAN band (band 8),
    because there is a coherent noise-like effect creating a response
    difference between "odd" and "even" image lines.  Several RPS processing
    algorithms need to account for this difference.
  
    The parentheses around the parameter name in the macro definition ARE
    IMPORTANT, so don't delete them */
 #define IAS_IS_EVEN_LINE(line_index)                                 \
     (((line_index) & 0x01) != 0)
  
  
 /* Common value used by create_grid and terrain_occlusion to represent
    an invalid elevation value.  Other GPS (and perhaps RPS) needing
    a value to represent an invalid elevation data value should use
    this constant */
 #define INVALID_ELEVATION -999999
  
 /*           ******* QUALITY BAND BIT IDENTIFICATION *******
  
    Each sample is assigned a 16-bit mask indicating the status of that sample.
    The bit positions of the mask are described below.  The representation of a
    16-bit mask is shown on the right with a flag indicating where each class's
    confidence level is stored.
   
        Flag Description    Bits   Flag 
        ------------------  -----  ----
        Fill:                   0    f
        Dropped Frame:          1    d          CCcc ssvv RRww Rtdf
        Terrain Occlusion:      2    t          1111 1111 1111 1111
        <reserved>:             3    R
        Water:                4-5    w
        <reserved>:           6-7    R
        Vegetation:           8-9    v
        Snow & Ice:         10-11    s
        Cirrus:             12-13    c
        Cloud:              14-15    C
  
     The following defines can be used to extract the bit information from a
     quality band sample.
 */
  
 #define IAS_QUALITY_BIT_NOTHING           0x0000 /* No bits are selected */
  
 #define IAS_QUALITY_BIT_FILL              0x0001 /* Bit 0 */
  
 #define IAS_QUALITY_BIT_DROPPED_FRAME     0x0002 /* Bit 1 */
  
 #define IAS_QUALITY_BIT_TERRAIN_OCCLUSION 0x0004 /* Bit 2 */
  
 #define IAS_QUALITY_BIT_RESERVED_1        0x0008 /* Bit 3 */
  
 #define IAS_QUALITY_BIT_WATER_01          0x0010 /* Bit 4 */
 #define IAS_QUALITY_BIT_WATER_10          0x0020 /* Bit 5 */
 #define IAS_QUALITY_BIT_WATER_11          0x0030 /* Bits 4 and 5 */
  
 #define IAS_QUALITY_BIT_RESERVED_2        0x0040 /* Bit 6 */
 #define IAS_QUALITY_BIT_RESERVED_3        0x0080 /* Bit 7 */
  
 #define IAS_QUALITY_BIT_VEGETATION_01     0x0100 /* Bit 8 */
 #define IAS_QUALITY_BIT_VEGETATION_10     0x0200 /* Bit 9 */
 #define IAS_QUALITY_BIT_VEGETATION_11     0x0300 /* Bits 8 and 9 */
  
 #define IAS_QUALITY_BIT_SNOW_ICE_01       0x0400 /* Bit 10 */
 #define IAS_QUALITY_BIT_SNOW_ICE_10       0x0800 /* Bit 11 */
 #define IAS_QUALITY_BIT_SNOW_ICE_11       0x0C00 /* Bits 10 and 11 */
  
 #define IAS_QUALITY_BIT_CIRRUS_01         0x1000 /* Bit 12 */
 #define IAS_QUALITY_BIT_CIRRUS_10         0x2000 /* Bit 13 */
 #define IAS_QUALITY_BIT_CIRRUS_11         0x3000 /* Bits 12 and 13 */
  
 #define IAS_QUALITY_BIT_CLOUD_01          0x4000 /* Bit 14 */
 #define IAS_QUALITY_BIT_CLOUD_10          0x8000 /* Bit 15 */
 #define IAS_QUALITY_BIT_CLOUD_11          0xC000 /* Bits 14 and 15 */
  
 #endif
  