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Unverified Commit 667cb12d authored by jlaura's avatar jlaura Committed by GitHub
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{
"$schema": "http://json-schema.org/draft-07/schema#",
"title": "Instrument Specification Definition",
"description": "The Instrument Specification Definition for Astro CSM",
"type": "object",
"properties": {
"detector_center": {
"description": "Center of the detector in pixel coordinates (line, sample)",
"type": "array",
"items": {
"type": "number",
"description": "The (line, sample) of the center of the detector.",
"minItems": 2,
"maxItems": 2
}
},
"center_ephemeris_time": {
"description": "The center ephemeris time of the image",
"type": "number"
},
"starting_ephemeris_time": {
"description": "The starting ephemeris time of the image",
"type": "number"
},
"focal_length_model": {
"description": "The static focal length or the information needed to model a variable focal length",
"type": "object",
"properties": {
"key": {
"type": "string",
"description":"A key to get information about time/temp dependent focal length models"
},
"focal_length": {
"type": "number",
"description":"The focal length in mm"
},
"focal_epsilon": {
"type": "number",
"description":"The uncertainty of the focal length in mm"
}
},
"required": ["focal_length"]
},
"image_lines": {
"description": "The number of lines in the image",
"type": "number"
},
"image_samples": {
"description": "The the number of samples in the image",
"type": "number"
},
"radii": {
"description": "The radii of the target.",
"type": "array",
"items": {
"type": "number",
"description": "The (semi-major axis, semi-minor axis) for the target.",
"minItems": 1,
"maxItems": 2
}
},
"optical_distortion": {
"description": "Information needed to convert from undistorted to distorted image plane",
"type": "object",
"properties" : {
"coefficients": {
"type": "array",
"items": {
"type": "number"
"description": "Each coefficient used for the distortion equation in order of
increasing degrees."
}
},
"key" : {
"type": "string",
"description": "Key into LUT to determine equation to use."
}
},
"required": ["coefficients", "equation_key"]
},
"starting_detector_sample": {
"description": "The sample on the detector where the data starts",
"type": "number"
},
"starting_detector_line": {
"description": "The line on the detector where the data starts",
"type": "number"
},
"focal2pixel_samples": {
"description": "Transformation x coefficients from focal plane (mm) to detector pixel coordinates",
"type": "array",
"items": {
"type": "number"
}
},
"focal2pixel_lines": {
"description": "Transformation y coefficients from focal plane (mm) to detector pixel coordinates",
"type": "array",
"items": {
"type": "number",
"minItems": 3,
"maxItems": 3
}
},
"sensor_location": {
"description": "(X, Y, Z) location of sensor in body-fixed frame.",
"type": "array",
"items": {
"type": "array",
"items" : {
"type": "number",
"minItems": 3,
"maxItems": 3
}
}
},
"sensor_velocity" : {
"description": "(v_x, v_y, v_z) velocity of sensor in body-fixed frame.",
"type": "array",
"items": {
"type": "array",
"items" : {
"type": "number",
"minItems": 3,
"maxItems": 3
}
}
},
"sun_position" : {
"description": "(x, y,z) of the sun in body-fixed frame.",
"type": "array",
"items": {
"type": "array",
"items" : {
"type": "number",
"minItems": 3,
"maxItems": 3
}
}
},
"sun_velocity" : {
"description": "(v_x, v_y, v_z) velocity of sun in body-fixed frame.",
"type": "array",
"items": {
"type": "array",
"items" : {
"type": "number",
"minItems": 3,
"maxItems": 3
}
}
},
"sensor_orientation" : {
"description": "Orientation of the sensor provided in quaternions",
"type": "array",
"items": {
"type": "array",
"description": "Each quaternion is of the general form: (scalar, vector component,
vector component, vector component). The specific form used is that
described in the NAIF Quaternions whitepaper under 'SPICE Quaternions'
available at:
ftp://naif.jpl.nasa.gov/pub/naif/misc/Quaternion_White_Paper/Quaternions_White_Paper.pdf"
"items" : {
"type": "number",
"minItems": 4 ,
"maxItems": 4
}
}
},
"line_scan_rate": {
"description": "The line rates of the detector map with the associated start line and time",
"type": "array",
"items": {
"type": "array",
"items" : {
"type": "number",
"default": "-1",
"description": "The (start_line, line_start_time, exposure_time). The exposure time is
in seconds and any non-provided values will be set to -1."
"minItems": 3,
"maxItems": 3
}
}
},
"detector_sample_summing": {
"description": "The summing in the sample-direction. A summing of 1 indicates no summing,
summing of 2 indicates 2 pixel summing, 4 indicates 4 pixel summing, etc",
"type": "number"
},
"detector_line_summing": {
"description": "The summing in the line-direction",
"type": "number"
},
"apply_light_time_correction": {
"description": "A flag to indcate whether the light-time correction should be applied",
"type": "bool"
},
"number_of_ephemerides": {
"description": "The number of emphemeris points",
"type": "number"
},
"number_of_quaternions": {
"description": "The number of quaternions",
"type": "number"
},
"dt_ephemeris": {
"description": "The time between each ephemeris point.",
"type": "number"
},
"t0_ephemeris": {
"description": "First ephemeris time - center image time",
"type": "number"
},
"dt_quaternion": {
"description": "Time spacing of quaternions.",
"type": "number"
},
"t0_quaternion": {
"description": "First quaternion time - center image time.",
"type": "number"
},
"reference_height": {
"description": "Used for determining the intersection of the look vector with the ellipsoid",
"type": "array",
"items": {
"type": "number",
"minItems": 2,
"maxItems": 2
}
},
"interpolation_method": {
"description": "The type of interpolation method to use.",
"type": "string",
"enum" : ["lagrange"]
},
"required": ["focal_length_model", "ephemeris_start_time, "ccd_center","reference_height","sensor_orientation",
"focal2pixel_lines","focal2pixel_samples","radii","image_samples", "image_lines", "starting_detector_sample"
"starting_detector_line" ]
}
}
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