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code and data for calculating abundancy of iron on Vesta
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| #!/usr/bin/env python | ||
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| import numpy as np | ||
| import matplotlib | ||
| import matplotlib.image | ||
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| filename = "../data/Vesta/iron/GRD_IRON_CORRECTED_COUNTS_MAP.TAB" | ||
| filename_out = "../data/Vesta/iron//vesta-iron-abundancy.png" | ||
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| data = np.loadtxt(filename) | ||
| grid = np.zeros((2*180,2*360),dtype=np.float64) | ||
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| minval = np.min(data[:,7]) | ||
| maxval = np.max(data[:,7]) | ||
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| for i in range(len(data)): | ||
| ymin = int((data[i][1] + 90) * 2) | ||
| ymax = int((data[i][2] + 90) * 2) | ||
| xmin = int(((data[i][4] + 360) % 360) * 2) | ||
| xmax = int(((data[i][5] + 360) % 360) * 2) | ||
| dx = int(data[i][6] * 2) | ||
| val = (data[i][7] - minval)/(maxval - minval) | ||
| # | ||
| for y in range(ymin, ymax): | ||
| for x in range(xmin, xmin+dx): | ||
| grid[360-y-1][x%720] = val | ||
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| matplotlib.image.imsave(filename_out, grid, cmap='gray') | ||
| # plt.imshow(grid) | ||
| # plt.show() |
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| PDS_VERSION_ID = PDS3 | ||
| /* label standards identifiers PDS Version 3.8 */ | ||
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| /* File Characteristics */ | ||
| RECORD_TYPE = FIXED_LENGTH | ||
| RECORD_BYTES = 67 | ||
| FILE_RECORDS = 178698 | ||
| MD5_CHECKSUM = "8d705dc0dbbbed639c833910334bdd80" | ||
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| /* Pointers to Data Objects */ | ||
| ^TABLE = "GRD_IRON_CORRECTED_COUNTS_MAP.TAB" | ||
| PRODUCER_FULL_NAME = "N. YAMASHITA" | ||
| PRODUCER_INSTITUTION_NAME = "PLANETARY SCIENCE INSTITUTE" | ||
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| /* Identification Data Elements */ | ||
| MISSION_NAME = "DAWN MISSION TO VESTA AND CERES" | ||
| MISSION_ID = "DAWN" | ||
| MISSION_PHASE_NAME = "VESTA SCIENCE LAMO (VSL)" | ||
| TARGET_NAME = "4 VESTA" | ||
| TARGET_TYPE = "ASTEROID" | ||
| INSTRUMENT_HOST_NAME = "DAWN" | ||
| INSTRUMENT_HOST_ID = "DAWN" | ||
| INSTRUMENT_ID = "GRAND" | ||
| INSTRUMENT_NAME = "GAMMA-RAY AND NEUTRON DETECTOR" | ||
| DATA_SET_ID = "DAWN-A-GRAND-5-VESTA-GAMMA-IRON-COR-V1.0" | ||
| DATA_SET_NAME = "DAWN GRAND MAP VESTA GAMMA FE CORRECTED COUNTS V1.0" | ||
| PRODUCT_ID = "GRD_IRON_CORRECTED_COUNTS_MAP" | ||
| PRODUCT_TYPE = "DATA" | ||
| PRODUCT_VERSION_ID = "1.0" | ||
| START_TIME = 2011-12-08T01:18:52 | ||
| STOP_TIME = 2012-04-27T17:16:15 | ||
| SPACECRAFT_CLOCK_START_COUNT = "0376579234.000" | ||
| SPACECRAFT_CLOCK_STOP_COUNT = "0388819077.000" | ||
| PRODUCT_CREATION_TIME = 2013-07-31T22:52:20 | ||
|
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| /* Data Object Definitions */ | ||
| OBJECT = TABLE | ||
| ROWS = 178698 | ||
| ROW_BYTES = 67 | ||
| COLUMNS = 8 | ||
| INTERCHANGE_FORMAT = ASCII | ||
| DESCRIPTION =" | ||
| BGO counting rate of Fe 7.6 MeV gamma-ray peaks measured by GRaND on Dawn | ||
| at Vesta. The counting rates were normalized for variations of live time, | ||
| solid angle of Vesta, and galactic cosmic ray intensity, smoothed, and | ||
| corrected for variations of neutron number density. For more details, see | ||
| Yamashita et al., 2013 (doi:10.1111/maps.12139). | ||
| " | ||
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| OBJECT = COLUMN | ||
| NAME = "PIXEL_INDEX" | ||
| DATA_TYPE = ASCII_INTEGER | ||
| START_BYTE = 1 | ||
| BYTES = 10 | ||
| FORMAT = "I10" | ||
| DESCRIPTION = " | ||
| Pixel index. The map covers -90 to 90 degrees latitude and -180 to 180 | ||
| degrees east longitude in the Claudia Double Prime coordinate system. | ||
| Pixels are indexed from west to east and from south to north, starting | ||
| with 0. | ||
| " | ||
| END_OBJECT = COLUMN | ||
|
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| OBJECT = COLUMN | ||
| NAME = "MIN_LAT" | ||
| DATA_TYPE = ASCII_REAL | ||
| UNIT = "DEGREE" | ||
| START_BYTE = 11 | ||
| BYTES = 7 | ||
| FORMAT = "F7.1" | ||
| DESCRIPTION = " | ||
| Pixel latitude southernmost boundary. | ||
| " | ||
| END_OBJECT = COLUMN | ||
|
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| OBJECT = COLUMN | ||
| NAME = "MAX_LAT" | ||
| DATA_TYPE = ASCII_REAL | ||
| UNIT = "DEGREE" | ||
| START_BYTE = 18 | ||
| BYTES = 7 | ||
| FORMAT = "F7.1" | ||
| DESCRIPTION = " | ||
| Pixel latitude northernmost boundary. | ||
| " | ||
| END_OBJECT = COLUMN | ||
|
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| OBJECT = COLUMN | ||
| NAME = "DELTA_LAT" | ||
| DATA_TYPE = ASCII_REAL | ||
| UNIT = "DEGREE" | ||
| START_BYTE = 25 | ||
| BYTES = 7 | ||
| FORMAT = "F7.1" | ||
| DESCRIPTION = " | ||
| Width of pixel in latitude. | ||
| " | ||
| END_OBJECT = COLUMN | ||
|
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| OBJECT = COLUMN | ||
| NAME = "MIN_LON" | ||
| DATA_TYPE = ASCII_REAL | ||
| UNIT = "DEGREE" | ||
| START_BYTE = 32 | ||
| BYTES = 7 | ||
| FORMAT = "F7.1" | ||
| DESCRIPTION = " | ||
| Pixel east longitude westernmost boundary. | ||
| " | ||
| END_OBJECT = COLUMN | ||
|
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| OBJECT = COLUMN | ||
| NAME = "MAX_LON" | ||
| DATA_TYPE = ASCII_REAL | ||
| UNIT = "DEGREE" | ||
| START_BYTE = 39 | ||
| BYTES = 7 | ||
| FORMAT = "F7.1" | ||
| DESCRIPTION = " | ||
| Pixel east longitude easternmost boundary. | ||
| " | ||
| END_OBJECT = COLUMN | ||
|
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| OBJECT = COLUMN | ||
| NAME = "DELTA_LON" | ||
| DATA_TYPE = ASCII_REAL | ||
| UNIT = "DEGREE" | ||
| START_BYTE = 46 | ||
| BYTES = 7 | ||
| FORMAT = "F7.1" | ||
| DESCRIPTION = " | ||
| Width of pixel in longitude. | ||
| " | ||
| END_OBJECT = COLUMN | ||
|
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| OBJECT = COLUMN | ||
| NAME = "FE_COUNTING_RATE" | ||
| DATA_TYPE = ASCII_REAL | ||
| UNIT = "COUNTS/S" | ||
| START_BYTE = 53 | ||
| BYTES = 13 | ||
| FORMAT = "E13.3" | ||
| DESCRIPTION = " | ||
| Fe counting rate at 7.6 MeV corrected for neutron number density | ||
| (counts/s). | ||
| " | ||
| END_OBJECT = COLUMN | ||
|
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| END_OBJECT = TABLE | ||
| END |
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