John M. Meyer
Raymond Kokaly
Todd M. Hoefen
Garth E. Graham
Karen D. Kelley
20221215
ASD FieldSpecⓇ NG calibration data - collected at Cripple Creek Victor mine, Cripple Creek, Colorado, 2017
tabular data
Denver, CO
U.S. Geological Survey
Additional Information about Originators:
Meyer, J. M., https://orcid.org/0000-0003-2810-9414;
Kokaly, R., https://orcid.org/0000-0003-0276-7101;
Hoefen, T. M., https://orcid.org/0000-0002-3083-5987;
Graham, G. E., https://orcid.org/0000-0003-0657-0365;
Kelley, K. D., https://orcid.org/0000-0002-3232-5809.
Suggested Citation: Meyer, J.M., Kokaly, R., Hoefen, T.M., Graham, G.E., and Kelley, K.D., 2022, HySpex by NEO VNIR-1800 and SWIR-384 imaging spectrometer radiance and reflectance data, with associated ASD FieldSpecⓇ NG calibration data, collected at Cripple Creek Victor mine, Cripple Creek, Colorado, 2017: U.S. Geological Survey data release, https://doi.org/10.5066/P92VF8HP.
https://doi.org/10.5066/P92VF8HP
HySpex by NEO VNIR-1800 and SWIR-384 imaging spectrometer radiance data were acquired on September 14, 2017 at the Cresson Pit of the Cripple Creek & Victor mine in Cripple Creek, Colorado. ASD FieldSpecⓇ NG data were collected on September 13 and 14, 2017 at two calibration sites within the Cresson Pit imaged with the HySpex by NEO imaging spectrometers. The HySpex by NEO VNIR-1800 imaging spectrometer is a push broom type instrument that utilizes 1800 pixels to collect 186 channels of spectral data in the region of 400 to 1000 nanometer (nm). The spectral sampling interval of the HySpex by NEO VNIR-1800 is 3.26 nm with a 17° field of view (Norsk Elektro Optikk AS, 2016b). The HySpex by NEO SWIR-384 imagining spectrometer is a push broom type instrument that utilizes 384 pixels to collect 288 channels of spectral data in the region of 930 to 2500 nm. The spectral sampling interval of the HySpex by NEO SWIR-384 is 5.45 nm with a 16° field of view (Norsk Elektro Optikk AS, 2016a). The ASD FieldSpec NG point spectrometer has a spectral range of 350 to 2500 nm, a spectral resolution of 3 nm @ 700 nm and 6 nm @ 1400/2100 nm, with a spectral sampling of 1.4 nm @ 350 to 1000 nm and 1.1 nm @ 1001 to 2500 nm. The ASD FieldSpecⓇ NG collects 2151 channels of spectral data within a 25° field of view (Malvern Panalytical, 2018).
Imaging spectrometer data were collected by mounting the HySpex by NEO VNIR-1800 and SWIR-384 imaging spectrometers on a rotating stage at the southeast portion of the Cresson Pit. The distance from the imaging spectrometers to areas imaged on the opposite side of the pit ranged from approximately 300 to 1500 m. This resulted in a pixel size of 4.7 to 23.4 cm for the VNIR data and 22 to 110 cm for the SWIR data.
ASD FieldSpecⓇ NG spectra from each calibration site were spectrally averaged, converted to absolute reflectance, and convolved to the bandpass and sampling interval of the HySpex by NEO data. HySpex by NEO radiance spectra from regions of interest that encompassed the calibration sites were also spectrally averaged. Multipliers were generated by dividing the averaged and convolved ASD FieldSpecⓇ NG calibration site absolute reflectance data with the averaged HySpex by NEO radiance data encompassing the calibration sites. HySpex by NEO reflectance data cubes were generated by applying the multipliers to the HySpex by NEO radiance data cubes. The resultant reflectance cubes were then combined to create the reflectance mosaic. White mica wavelength position maps were generated using routines in the U.S. Geological Survey PRISM version1aq software suite (Kokaly, 2011).
HySpex by NEO VNIR-1800 and SWIR-384 imaging spectrometer radiance data. HySpex by NEO data were collected as one component of a USGS mineral resource project with the goals of enhancing geologic mapping and developing methods to identify and characterize mineral deposits through the use of imaging spectroscopy. ASD FieldSpecⓇ data were collected to verify the HySpex by NEO data and to be used to convert the HySpex by NEO radiance data to reflection data. Techniques and skills developed are applicable elsewhere. The data contained in this data release is associated with the following publication: Meyer, 2022.
References Cited:
Kokaly, R.F., 2011, PRISM: Processing routines in IDL for spectroscopic measurements (installation manual and user's guide, version 1.0): U.S. Geological Survey Open-File Report 2011-1155, 432 p., https://doi.org/10.3133/ofr20111155.
Malvern Panalytical, 2018, ASD FieldSpecⓇ 4 Hi-Res NG Spectroradiometer, accessed December 1, 2018 at https://www.malvernpanalytical.com/en/products/product-range/asd-range/fieldspec-range/fieldspec-4-hi-res-ng-spectroradiometer/.
Meyer, J.M., Kokaly, R.F., and Holley, E. (2022). Hyperspectral remote sensing of white mica: A review of imaging and point-based spectrometer studies for mineral resources, with spectrometer design considerations: Remote Sensing of Environment, 275, https://doi.org/10.1016/j.rse.2022.113000.
Norsk Elektro Optikk AS, 2016a, HySpex SWIR-384, accessed June 1, 2017 at http://www.hyspex.no/products/.
Norsk Elektro Optikk AS, 2016b, HySpex VNIR-1800, accessed June 1, 2017 at http://www.hyspex.no/downloads/.
2017
2017
ground condition
None planned
-105.17791
-105.10512
38.76258
38.69765
ISO 19115 Topic Category
geoscientificInformation
USGS Thesaurus
Mineralogy
Mineral Resources
Economic Geology
Hyperspectral Imaging
Remote Sensing
none
Geology, Geophysics, and Geochemistry Science Center
GGGSC
Mineral Resources Program
MRP
Cripple Creek North
Cripple Creek South
Cripple Creek District Mine
USGS Metadata Identifier
USGS:62977271d34ec53d276c0c90
Common Geographic Areas
United States
Colorado
Pikes Peak
Big Bull Mountain
Geographic Names Information System (GNIS)
Teller County
Cripple Creek
Front Range
None. Please see "Distribution Info" for details.None.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein.
John M Meyer
U.S. Geological Survey
Geophysicist
mailing
Box 25046 MS 973 Denver Federal Center
Denver
CO
80225
USA
303-236-3531
jmmeyer@usgs.gov
This release of the dataset was funded by the Mineral Resources Program. The authors would like to thank Newmont Corporation.
Attribute fields and values were reviewed and checked for accuracy and consistency of terms.
No formal logical accuracy tests were conducted.
Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Calibration sites were located using a handheld GPS unit. The location determined by GPS should be accurate to the nearest 10,000th of a degree of latitude (11 meters) or longitude (8.7 meters).
No formal vertical accuracy tests were conducted.
Imaging Spectrometer Data Collection
HySpex by NEO VNIR-1800 and HySpex by NEO SWIR-384 radiance data were collected in the Cresson Pit of the Cripple Creek & Victor mine on September 14, 2017. Imaging spectrometer data were collected by mounting the HySpex by NEO VNIR-1800 and SWIR-384 imaging spectrometers on a rotating stage at the southeast portion of the Cresson Pit at approximately 32.7278, -105.1350. The distance from the imaging spectrometers to areas imaged on the opposite side of the pit ranged from approximately 300 to 1500 m. This resulted in a pixel size of 4.7 to 23.4 cm for the VNIR data and 22 to 110 cm for the SWIR data. Each scan captured a panorama of the Cresson Pit. Varying the angle of the imaging spectrometers in relation to horizontal generated scans of different depths of the pit. Multiple scans were made as the angle of the cameras was varied.
2018
Point Spectrometer Data Collection of Calibration Sites
Two calibration sites were identified and located using handheld GPS units. Calibration sites were chosen based upon accessibility, illumination during scanning, high albedo, and uniformity of spectral response across the region of 400 to 2500 nm. ASD FieldSpecⓇ NG spectra from each calibration site were collected, spectrally averaged, converted to absolute reflectance, and convolved from ASD FieldSpecⓇ NG sampling and bandpass to HySpex sampling and bandpass using functions in Kokaly (2011).
2018
Geographic Names Information System (GNIS) placenames and Common Geographic Areas keywords are used to identify the location of the hyperspectral data; The data are in raster format but are not related to ground coordinates and do not contain projection information. The calibration sites were located with a handheld GPS (WGS84 datum).
Raster
0.00001
0.00001
Decimal Degrees
WGS84
WGS84
6378137
298.25722
calibration_site1_ASD_field_spectra.txt
Tab-delimited ASCII text file containing ASD FieldSpecⓇ NG spectrometer calibration data for site 1
U.S. Geological Survey
Wavelengths
Center of each channel reported in microns
U.S. Geological Survey
0.350000024
2.499300003
microns
Bandpass_FWHM
Bandpass of each channel reported in microns
U.S. Geological Survey
0.00244487
0.012936864
microns
Record_569
Apparent reflectance of each channel reported on a scale of 0 to 1, with 1 representing 100% reflectance.
U.S. Geological Survey
0.065935493
0.629003108
microns
calibration_site2_ASD_field_spectra.txt
Tab-delimited ASCII text file containing ASD FieldSpecⓇ NG spectrometer calibration data for site 2.
U.S. Geological Survey
Wavelengths
Center of each channel reported in microns
U.S. Geological Survey
0.3500000238
2.4993000031
microns
Bandpass_FWHM
Bandpass of each channel reported in microns
U.S. Geological Survey
0.0024448701
0.0129368640
microns
Record_935
Apparent reflectance of each channel reported on a scale of 0 to 1, with 1 representing 100% reflectance.
U.S. Geological Survey
0.1338009387
0.6528089643
microns
The files 'calibration_site1_ASD_field_spectra.txt' and 'calibration_site2_ASD_field_spectra.txt' contain spectral measurements collected using an ASD FieldSpecⓇ NG spectrometer of calibration site 1 and calibration site 2 respectively. The ASD FieldSpecⓇ NG collects 2150 channels of data in the region from 0.350 to 2.499 microns. Absolute reflectance data for each channel is reported on a scale of 0 to 1.
Suggested Citation: Meyer, J.M., Kokaly, R., Hoefen, T.M., Graham, G.E., Kelley, K.D., 2021, HySpex by NEO VNIR-1800 and SWIR-384 imaging spectrometer radiance and reflectance data, with associated ASD FieldSpecⓇ NG calibration data, collected at Cripple Creek Victor mine, Cripple Creek, Colorado, 2017: U.S. Geological Survey data release, https://doi.org/10.5066/P92VF8HP.
U.S. Geological Survey - ScienceBase
U.S. Geological Survey
mailing and physical
Building 810, Mail Stop 810, Denver Federal Center
Denver
CO
80225
USA
1-888-275-8747
sciencebase@usgs.gov
https://www.sciencebase.gov/catalog/item/62977271d34ec53d276c0c90
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
digital data
No compression applied.
https://doi.org/10.5066/P92VF8HP
none
none
20230710
John M Meyer
U.S. Geological Survey
Geophysicist
mailing
Box 25046 MS 973 Denver Federal Center
Denver
CO
80225
USA
303-236-3531
jmmeyer@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998