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Differential Optical Absorption Spectroscopy data acquired at Mount Pagan volcano (Mariana Islands) on 6 April 2014

Metadata Updated: October 29, 2023

On 6 April 2014, a Differential Optical Absorption Spectroscopy (DOAS) instrument was used to measure the radiance of scattered solar radiation passing through the plume emitted from Mount Pagan volcano, Mariana Islands. Spectra were recorded in the ultraviolet (UV: 240 – 390 nm) wavelength range at 0.6 nm resolution. A scanner was used to scan the spectrometer's viewing direction vertically through the volcanic plume. The scanner was located at 18.1235N, 145.7608E and aimed directly to the north (0 degrees azimuth). It scanned the spectrometer's viewing direction from 1 to 90 degrees elevation in steps of 1 degree. The plume was encountered at about 15 to 20 degrees elevation. The scanner was held at each position for about 1 second during which the UV spectrum was acquired. The plume scans ran from 08:22 to 09:14 local time and 2,203 spectra were recorded. All recorded spectra were stamped with GPS time and location. Each spectrum is saved in a separate ASCII file which includes the 2048 radiances recorded across the spectral window of the spectrometer along with metadata associated with each acquisition. A separate file named 'WavelengthCalibration.CSV' contains the spectrometer's wavelength calibration, where each pixel number is assigned a wavelength in nanometers.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023
Publisher U.S. Geological Survey
Identifier USGS:5b1b126fe4b092d9652524c3
Data Last Modified 20200827
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id a591ee15-258a-42d7-a6a9-24be1894fa2b
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial 145.7,18.19,145.85,18.08
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 022eda56f4898b5142a4ce43fb02e559cd726be5ac1b6ac70117453f8639b849
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": 145.7, 18.19, 145.7, 18.08, 145.85, 18.08, 145.85, 18.19, 145.7, 18.19}

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