Documentation Revision Date: 2023-02-23
Dataset Version: 2
Summary
The MASTER instrument is a modified Daedalus Wildfire scanning spectrometer that flies on a variety of multi-altitude research aircraft and provides spectral information similar to that provided by the Moderate Resolution Imaging Spectroradiometer (MODIS) and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), which are aboard two NASA Earth Observing System satellites: Terra and Aqua. MASTER provides data in 50 channels spanning visible to thermal infrared wavelengths (0.4 – 13 µm). Its data have been used to study geological patterns, land covers, ecological disturbances, and other phenomena that affect Earth surface properties.
This dataset includes a total of 140 data files: 43 files in Hierarchical Data Format (HDF-4; *.hdf) format, 36 text (*.txt) files, 9 archives of text files that are zipped (*.zip), 9 flight maps as GIF (*.gif) images, and 43 browse images in JPEG (*.jpg) format.
Citation
Hook, S.J., J.S. Myers, K.J. Thome, M. Fitzgerald, A.B. Kahle, Airborne Sensor Facility NASA Ames Research Center, F.F. Sabins, T.J. Schmugge, and G.R. Keller. 2022. MASTER: Jornada and Sevilleta, Southwestern US, October, 2002, V2. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/2147
Table of Contents
- Dataset Overview
- Data Characteristics
- Application and Derivation
- Quality Assessment
- Data Acquisition, Materials, and Methods
- Data Access
- References
- Dataset Revisions
Dataset Overview
This dataset includes Level 1B (L1B) data products from the MODIS/ASTER Airborne Simulator (MASTER) instrument. The spectral data were collected during nine flights aboard a DOE B-200 aircraft over Arizona, California, Nevada and New Mexico, U.S., on 2002-10-01 to 2002-10-08. Flights included coverage of the Jornada Experimental Range (JORNEX) in New Mexico. This deployment was coordinated by the U.S. Department of Energy’s Remote Sensing Laboratory (RSL) located at Nellis Air Force Base near Las Vegas, Nevada. Data products include L1B georeferenced multispectral imagery of calibrated radiance in 50 bands covering wavelengths of 0.460 to 12.879 micrometers at approximately 15-meter spatial resolution. The L1B file format is HDF-4. In addition, the dataset includes flight paths, spectral band information, instrument configuration, ancillary notes, and summary information for each flight, and browse images derived from each L1B data file.
The MASTER instrument is a modified Daedalus Wildfire scanning spectrometer that flies on a variety of multi-altitude research aircraft and provides spectral information similar to that provided by the Moderate Resolution Imaging Spectroradiometer (MODIS) and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), which are aboard two NASA Earth Observing System satellites: Terra and Aqua. MASTER provides data in 50 channels spanning visible to thermal infrared wavelengths (0.4 – 13 µm). Its data have been used to study geological patterns, land covers, ecological disturbances, and other phenomena that affect Earth surface properties.
Project: MODIS/ASTER Airborne Simulator
The MODIS/ASTER Airborne Simulator (MASTER) is a scanning spectrometer which flies on a variety of multi-altitude research aircraft and provides data similar to the Moderate Resolution Imaging Spectroradiometer (MODIS) and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). MASTER first flew in 1998 and has ongoing deployments as a Facility Instrument in the NASA Airborne Science Program (ASP). MASTER is a joint project involving the Airborne Sensor Facility (ASF) at the Ames Research Center, the Jet Propulsion Laboratory (JPL), and the Earth Resources Observation and Science Center (EROS).
Related Publications
Hook, S.J. Myers, J.J., Thome, K.J., Fitzgerald, M. and A.B. Kahle. 2001. The MODIS/ASTER airborne simulator (MASTER) - a new instrument for earth science studies. Remote Sensing of Environment 76:93–102. https://doi.org/10.1016/S0034-4257(00)00195-4
Related Datasets
Additional MASTER datasets are available on the ORNL DAAC MASTER project page.
Acknowledgments
The MASTER instrument is maintained and operated by the Airborne Sensor Facility (ASF) at NASA Ames Research Center in Mountain View, California, under the oversight of the EOS Project Science Office at NASA Goddard. Data processing was conducted at NASA Ames Research Center and the Jet Propulsion Laboratory at the California Institute of Technology in Pasadena, California.
Data Characteristics
Spatial Coverage: Portions of Arizona, California, Nevada and New Mexico, U.S.
Spatial Resolution: 6 to 19 m
Temporal Coverage: 2002-10-01 to 2002-10-08
Temporal Resolution: One-time estimate
Study Area: All latitudes and longitudes given in decimal degrees.
Site | Westernmost Longitude | Easternmost Longitude | Northernmost Latitude | Southernmost Latitude |
---|---|---|---|---|
Arizona, California, Nevada and New Mexico, U.S. | -120.978 | -106.568 | 36.596 | 32.426 |
Data File Information
This dataset includes a total of 140 data files: 43 files in Hierarchical Data Format (HDF-4; *.hdf) format, 36 text (*.txt) files, 9 archives of text files that are zipped (*.zip), 9 flight maps as GIF (*.gif) images, and 43 browse images in JPEG (*.jpg) format.
There are different numbers of each type of file, which corresponds to the number of "flights" and "flight tracks. A "flight" is flown on a single day, and a "flight track" typically refers to a segment of a given flight.
- There are nine flights, which include 43 flight tracks.
- For each flight track, there is one L1B data file in HDF format and one auxiliary browse image (*.jpg).
- For each flight, there is a collection of auxiliary files providing information about the flight and instrument configuration.
The primary data files are named MASTERLAA_BBBBBBBB_CC_YYYYMMDD_EEFF_GGHH_V0J-X.ext (e.g., MASTERL1B_0300101_01_20021001_2009_2009_V01.hdf).
The flight track-level browse images are named MASTERLAA_BBBBBBBB_CC_YYYYMMDD_EEFF_GGHH_V0J.jpg (e.g., MASTERL1B_0300101_01_20021001_2009_2009_V01.jpg).
The deployment-level auxiliary files are named MASTER_BBBBBBBB_YYYYMMDD_X.ext (e.g., MASTER_0300101_20021001_config.txt).
- AA = ”1B” , indicating L1B data level,
- BBBBBBBB = flight number (Table 2),
- CC = flight track (Table 2)
- YYYYMMDD = date of sampling,
- EEFF = starting time at EE hour and FF minute,
- GGHH = ending time at GG hour and HH minute,
- J = version number for file,
- X = the file content (see Table 1), and
- ext = "hdf", "gif", "jpg", "txt", or "zip", indicating the file extension.
Table 1. File names and descriptions.
File Name | Level | File Type | Total Files | Description |
---|---|---|---|---|
Primary Data Files | ||||
MASTERL1B_BBBBBBBB_CC_YYYYMMDD_EEFF_GGHH_V0J.hdf | L1B | HDF-4 | 43 | Multispectral radiance in 50 bands, pixel coordinates, sensor configuration, aircraft platform data, analysis parameters. The "CalibratedData" variable provides estimates of radiance in units of W m-2 sr-1 per micron. |
Auxiliary files | ||||
MASTERL1B_BBBBBBBB_CC_YYYYMMDD_EEFF_GGHH_V0J.jpg | L1B | JPEG | 43 | Browse figures; one per flight track, multiple tracks per flight. |
MASTER_BBBBBBBB_YYYYMMDD_ancillary.txt | - | Text | 9 | Ancillary information about flight including notes on aircraft platform, mission objective, and data evaluation. |
MASTER_BBBBBBBB_YYYYMMDD_config.txt | - | Text | 9 | Instrument configuration information for flight. |
MASTER_BBBBBBBB_YYYYMMDD_flightpath.gif | - | GIF | 9 | Map showing flight paths. |
MASTER_BBBBBBBB_YYYYMMDD_spectral_band_info.txt | - | Text | 9 | Spectral band information. |
MASTER_BBBBBBBB_YYYYMMDD_spectral_response_table.zip | - | Text | 9 | Spectral response tables by band (ZIP archive of 50 text files). |
MASTER_BBBBBBBB_YYYYMMDD_summary.txt | - | Text | 9 | Time and coordinates for start and end of flight tracks along with the number of scan lines, solar and instrument angles, aircraft altitude, and additional information. FTLT = flight track number. |
Data File Details
The HDF-4 files contain swath trajectory data using longitude, latitude coordinates. The spatial resolution is 6 to 19 m and is a function of aircraft altitude.
Table 2. Number of flight tracks for each MASTER flight during this 2002 deployment over Arizona (AZ), California (CA), New Mexico (NM), and Nevada (NV).
Date | Flight Number | Locations (USA) | Flight Tracks |
---|---|---|---|
2002-10-01 | 0300101 | Lake Mead, NV | 4 |
2002-10-02 | 0300102 | Altadena, CA | 2 |
2002-10-02 | 0300103 | Mustang Ridge, CA | 8 |
2002-10-03 | 0300104 | Altadena, CA | 5 |
2002-10-04 | 0300105 | Malibu / Agoura, CA | 2 |
2002-10-06 | 0300107 | Jornado, NM | 7 |
2002-10-07 | 0300108 | Western Arizona | 6 |
2002-10-08 | 0300109 | Red Lake, Kingman; AZ | 6 |
2002-10-08 | 0300110 | Southwest Arizona | 3 |
Total | 43 |
Application and Derivation
The primary objective of MASTER is to: (a) collect ASTER-like and MODIS-like land datasets to support the validation of the ASTER and MODIS geophysical retrieval algorithms; (b) collect these datasets at a higher resolution than the spaceborne datasets to permit scaling studies and comparisons with in-situ measurements; and (c) under fly the EOS-AM1 ASTER and MODIS sensors to provide an additional radiometric calibration to assist with in-flight instrument performance characterization. Calibration is particularly important for ASTER where on-board calibration is dependent on a single black body in the TIR and only partial aperture illumination in the VNIR.
A secondary objective of MASTER is to: (a) provide both a backup instrument and backup modules for the current MODIS Airborne simulator, which is committed to a program of atmospheric and oceanic measurements; and (b) provide a wider spectral and dynamic range alternative to the use of the Thematic Mapper (TM) airborne simulator and Thermal Infrared Multispectral Scanner (TIMS) airborne scanners (JPL, 2021b).
Flight 0300107 on 2002-10-06 included coverage of Jornada Experimental Range (JORNEX) and Sevilleta regions of New Mexico.
MASTER imagery has been used for mapping wildfires and their impacts (Veraverbeke et al., 2011), land covers (Li and Moon, 2004), coral reefs (Capolsini et al., 2003), and urban heat islands (Zhao and Wentz, 2016).
Quality Assessment
The MASTER instrument channels are calibrated spectrally and radiometrically in the laboratory preflight and postflight. The mid-infrared and thermal infrared channels (26–50) are also radiometrically calibrated in-flight by viewing an internal hot and cold blackbody with each scanline (Hook et al., 2001). Three calibration and validation experiments were conducted in 1998–2001 (Hook et al., 2001; JPL, 2021a). Spectral response information for this deployment is included in the MASTER_BBBBBBBB_YYYYMMDD_spectral_response_table.zip files.
Data Acquisition, Materials, and Methods
The MASTER instrument was developed by the NASA Ames Research Center in conjunction with the Jet Propulsion Laboratory. The instrument consists of three key components: the scanning spectrometer, the digitizer, and the storage system. The scanning unit was built by Sensys Technology (formerly Daedalus Enterprises) and the digitizer was a collaborative effort between Berkeley Camera Engineering and the Ames Airborne Sensor Facility (ASF). The data storage system and overall system integration were also provided by the ASF.
The MASTER instrument is similar to the MODIS Airborne Simulator (MAS) developed by the MODIS project (King et al., 1996). However, it has two key differences. First, MASTER supports a variety of scan speeds allowing it to acquire contiguous imagery from a variety of altitudes with different pixel sizes. Second, the channel positions are configured to closely match those of ASTER and MODIS. A detailed description of the instrument and optical system are provided by Hook et al. (2001) and King et al. (1996), respectively.
For this deployment, the MASTER instrument was flown on a DOE B-200 aircraft at altitudes of 2620 m to 3275 m above sea level. Study areas included portions of the Sevilleta National Wildlife Refuge south of Albuquerque, NM, and the Jornada Experimental Range near Las Cruces, NM.
Figure 2. Flight tracks in this dataset represented as blue rectangular polygons. Map shows southwestern U.S. Basemap: ©OpenStreetMap contributors.
Figure 3. Flight path is shown for 01 October 2002. Flight 0300101 and 4 flight tracks over the vicinity of Lake Mead east of Las Vegas, Nevada. Source: MASTER_0300101_20021001_flightpath.gif
Data Access
These data are available through the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC).
MASTER: Jornada and Sevilleta, Southwestern US, October, 2002, V2
Contact for Data Center Access Information:
- E-mail: uso@daac.ornl.gov
- Telephone: +1 (865) 241-3952
References
Capolsini, P., S. Andréfouët, C. Rion, and C. Payri. 2003. A comparison of Landsat ETM+, SPOT HRV, Ikonos, ASTER, and airborne MASTER data for coral reef habitat mapping in South Pacific islands. Canadian Journal of Remote Sensing 29:187-200. https://doi.org/10.5589/m02-088
Coll, C., V. Caselles, E. Rubio, F. Sospedra, and E. Valor. 2001. Temperature and emissivity separation from calibrated data of the Digital Airborne Imaging Spectrometer. Remote Sensing of Environment 76:250-259. https://doi.org/10.1016/S0034-4257(00)00207-8
Hook, S.J. Myers, J.J., Thome, K.J., Fitzgerald, M., and A.B. Kahle. 2001. The MODIS/ASTER airborne simulator (MASTER) - a new instrument for earth science studies. Remote Sensing of Environment 76:93-102. https://doi.org/10.1016/S0034-4257(00)00195-4
JPL. 2021a. Calibration and Validation, MASTER: MODIS/ASTER Airborne Simulator. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA. https://masterprojects.jpl.nasa.gov/cal-val
JPL. 2021b. Science objectives, MASTER: MODIS/ASTER Airborne Simulator. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA. https://masterprojects.jpl.nasa.gov/objectives
King, M.D., W.P. Menzel, P.S. Grant, J.S. Myers, G.T. Arnold, S.E. Platnick, L.E. Gumley, S.C. Tsay, C.C. Moeller, M. Fitzgerald, K.S. Brown, and F.G. Osterwisch. 1996. Airborne scanning spectrometer for remote sensing of cloud, aerosol, water vapor and surface properties. J. Atmospheric and Oceanic Technology 13:777-794. https://doi.org/10.1175/1520-0426(1996)013<0777:ASSFRS>2.0.CO;2
Li, P., and W.M. Moon. 2004. Land cover classification using MODIS-ASTER airborne simulator (MASTER) data and NDVI: A case study of the Kochang area, Korea. Canadian J. Remote Sensing 30:123-126. https://doi.org/10.5589/m03-061
Veraverbeke, S., S. Harris, and S. Hook. 2011. Evaluating spectral indices for burned area discrimination using MODIS/ASTER (MASTER) airborne simulator data. Remote Sensing of Environment 115:2702-2709. https://doi.org/10.1016/j.rse.2011.06.010
Zhao, Q., and E.A. Wentz. 2016. A MODIS/ASTER Airborne Simulator (MASTER) imagery for urban heat island research. Data 1:7. https://doi.org/10.3390/data1010007
Dataset Revisions
Version | Release Date | Revision Notes |
---|---|---|
2.0 | 2023-02-23 | Summary and ancillary files for Flight 0300107 were replaced with corrected versions |
1.0 | 2022-09-28 | Original publication |