MCST Acronyms and Terminology

Temperature-dependent offset for TEB calibration

Temperature-dependent quadratic coefficient for TEB calibration

Activation and Evaluation

Ante Meridian EOS Platform (Terra; orbit crosses equator ~10:30 am)

Angle of incidence

Application Program Interface

FM1 satellite that houses MODIS; http://eos-pm.gsfc.nasa.gov/

Algorithm Theoretical Basis Document

Advanced Very High Resolution Radiometer

Linear gain term (TEB)

BlackBody

Band-to-band registration

Blackbody Calibration Source (on ground, 270 – 315K)

Band, Detector, Subframe (sample), Mirror side

Bi-directional Reflectance Distribution Function

Bi-directional Reflectance Factor

Contract Data Requirements List

Cold Focal Plane Assembly

Common Gateway Interface

each detector element

Commercial Off-the-Shelf

Command Processor

Computing Resources of MCST

Distributed Active Archive Center

Direct Broadcast

Digital Count; alternatively Dark Current

Direct Current Restore

Digital Number; "Big DN". Raw signal recorded by MODIS, including SV with DCR

DN corrected for electronic background (i.e., DN-SV); called "little dn"

DN corrected for instrument effects (temp., MS, RVS), SV signal subtracted; called "dn star"

For RSBs, dn* as scaled to the scaled integer (SI) within a defined dynamic range so that a single set of calibration parameters applies for every detector in a band

dn value at which the detector saturates

Discrepancy Report

Electronics calibration (detectors omitted from circuit)

EOSDIS Core System

EROS Data Center

EOS Data Gateway (http://eos.nasa.gov/imswelcome)

EOS Data and Operations System

Engineering Model

Earth Observing System

EOS Data and Information System

RSR-weighted solar irradiance

Earth View

Frequently Asked Questions

MODIS Bands 21, 31, 32

Aqua satellite; Flight Model-1 (orbit crosses equator in pm)

Flight Operations Segment

Field of View

Focal Plane Assembly

Formatter (component of MODIS instrument)

1-km along scan or the length of time that the mirror scans a 1-km pixel

1 to 1354. Linearly related to scan angle. A cross-track (along scan) pixel.

Global Change Master Directory

Goddard DAAC

Geometric instantaneous field of view

Greenwich Mean Time

Five minutes (a data processing time unit)

Goddard Space Flight Center

Hierarchical Data Format

Integration and Test

Interface Control Document

Interactive Data Language

Institute of Electrical and Electronics Engineers

Instantaneous Field ofView

Instrument Operations Team

Infrared; alternatively Interim Release

Focal plane current (I) adjustment

Independent Verification and Validation

Instrument Temperature dependence coefficients

MODIS Radiance

Level 1A- Code (same as MOD_PR01) that unpacks the Level 0 data and reformats it into an HDF file and generates granule files

Level 1B- Code (same as MOD_PR02) that ingests L1A output and geolocation to produce radiances and reflectances

Saturation radiance

Look-Up Table . A value or array input to the L1B code. Resides in the Emissive LUT file, the Reflective LUT file, or the QA LUT file.

Long-Wavelength InfraRed, MODIS Bands 27-36

Level 1B: calibrated, geo-located data

Reflectance Calibration Linear Term (inversely proportional to detector response)

MODIS Airborne Simulator

Metadata Configuration Files, e.g., identifies the satellite.

MODIS Characterization Support Team

Marine Optical BuoY

Indicates Terra product

MODIS Adaptive Processing System

MODIS Document Archive

MODerate -resolution Imaging Spectroradiometer

Mirror Rotation Correlated Noise (diff. and ratios between mirror sides)

Mirror side 1; Mirror side 2

Mirror-side Correlated Noise = MRCN

MODIS sensor Working Group

Modulation Transfer Function (spatial response of non-uniform scenes)

Mid-Wavelength InfraRed, MODIS bands 20-25

Indicates Aqua product

Nadir Aperture Door

National Aeronautics and Space Administration

Noise Equivalent delta Radiance (L)

Near InfraRed, MODIS bands 1, 2, 13-19

Operational Activity

On-Board Calibrator (SD/SDSM, SRCA, BB, or SV)

On-orbit

Out of Band

Out of Family; refers to a detector with unusual characteristics in the band.

Photo-Conductive (detectors used for MODIS bands 31-36)

Process Control File (contains names of the MCFs; specifies inputs to L1B)

Product Change Request

Program Design Language

Proto Flight Model (Terra/MODIS)

Product Generation Executive (e.g., L1B = PGE02)

Product Generation System

Processing and Instrument Quality Metadatabase

Post Meridian EOS Platform (Aqua; orbit crosses equator ~1:30 pm)

Photo-Voltaic (detectors used for MODIS bands 1-30)

Quality Assurance

Quality Control

Watts/m2/um/steradian. Depends on distance (inverse square law).

The MODIS software configuration management system

Radiometric Calibration

rho(EV)*cos(Theta). Reflectance is the primary MODIS product. As a property of what we are viewing, it is independent of distance.

Reflective Solar Band (MODIS bands 1-19,26, including high and low gains for bands13 and 14)

Relative Spectral Response

Radiance Gain (linear response) Factor = Pi/(m1*Esun)

Response Vs. Scan angle

Santa Barbara Remote Sensing

Spacecraft

1.4771-second crosstrack sweep of the Earth; 1 mirror side per scan; approximately 203 scans per granule

Scattering Measurement Assembly

Solar Diffuser (screen "down" = unscreened SD)

Solar Diffuser Door

Scientific Data Processing

Scientific Data Set (multi-dimensional array in HDF files); alternatively Solar Diffuser Screen

Solar Diffuser Stability Monitor (a ratioing radiometer)

Science Data Support Team

Software Engineering Institute

Scaled Integer; alternatively System Integration

Silicon Photo Diode

Spherical Integrating Source

Scan Mirror Assembly

Signal to Noise Ratio

Spectral Measurement Assembly (TV)

Spectro-Radiometric Calibration Assembly

Solid State Recorder

Science Team Meeting

Software Test Plan

< 1km (applies to bands with better than 1 km spatial resolution)

Space View

Space View Port

Short-Wavelength InfraRed, MODIS bands 5, 6, 7, 26.

Test Analysis Controller (used by SBRS and MCST for data analysis)

International Atomic Time

To Be Determined

Time-Delay Integration

Thermal Emission Bands (MODIS bands 20-25, 27-36)

PFM satellite that houses MODIS

Telemetry

Team Leader Working Agreement

Telemetry Monitoring

Top of the Atmosphere

Thermal Vacuum (a pre-launch test environment)

Unique Acquisition Identifier (data files)

Uncertainty Index

Universal Resource Locator

U.S. Global Change Research Program

Universal Time Coordinates

Detector Voltage

Visible (MODIS bands 3, 4, 8-12)

OOB Response Reciprocal Gain Factor