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Update Frequency: As Needed
Latest Data Update: 2023-06-18
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2021-04-15
Download Stats: last 12 months
Dataset Size: 2.27M Files | 64TB


These data are a copy of MODIS data from the NASA Level-1 and Atmosphere Archive & Distribution System (LAADS) Distributed Active Archive Center (DAAC). The copy is potentially only a subset. Below is the description from

The MYD03 product inculdes the geolocation fields that are calculated for each 1 km MODIS Instantaneous Field of Views (IFOV) for all orbits daily. The locations and ancillary information correspond to the intersection of the centers of each IFOV from 10 detectors in an ideal 1 km band on the Earth's surface. A digital terrain model is used to model the Earth's surface. The main inputs are the spacecraft attitude and orbit, the instrument telemetry and the digital elevation model. The geolocation fields include geodetic Latitude, Longitude, surface height above the geoid, solar zenith and azimuth angles, satellite zenith and azimuth angles, and a land/sea mask for each 1 km sample. Additional information is included in the header to enable the calculation of the approximate location of the center of the detectors for any of the 36 MODIS bands. This product is used as input by a large number of subsequent MODIS products, particularly those produced by the Land team.

Shortname: MYD03 , Platform: Aqua , Instrument: MODIS , Processing Level: Level-1A , Spatial Resolution: 1 km , Temporal Resolution: 5 minute , ArchiveSets: 61, 6 , Collection: MODIS Collection 6.1 - Level 1, Atmosphere, Land (ArchiveSet 61) , PGE Number: PGE01 , File Naming Convention: MYD03.AYYYYDDD.HHMM.CCC.YYYYDDDHHMMSS.hdf AYYYYDDD = Acqusition Year and Day of Year HHMM = Hour and Minute of acquisition CCC = Collection number YYYYDDDHHMMSS = Production Date and Time YYYYDDD = Year and Day of Year of acquisition , Citation: MODIS Characterization Support Team (MCST), 2017. MODIS Geolocation Fields Product. NASA MODIS Adaptive Processing System, Goddard Space Flight Center, USA:

Citable as:  National Aeronautics and Space Administration (2021): MYD03 - Geolocation - 1km. National Aeronautics and Space Administration, date of citation.
Abbreviation: MYD03
Keywords: Not defined


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data were downloaded from to support UK research groups, especially NCEO.

Data Quality:
Look on the data source site ( for quality information
File Format:

Process overview

This dataset was generated by instruments deployed on platforms as listed below.

Mobile platform operations

Mobile Platform Operation 1 Aqua Satellite orbit details
Output Description


  • units: seconds
  • var_id: EV center time
  • var_id: EV frames
  • units: seconds
  • var_id: EV start time
  • units: meters
  • var_id: Focal_length
  • var_id: Geo scan quality
  • var_id: Height
  • units: meters
  • units: km
  • var_id: Height Offset
  • var_id: L1 scan quality
  • var_id: Land/SeaMask
  • units: degrees
  • var_id: Latitude
  • units: degrees
  • var_id: Longitude
  • var_id: Mirror side
  • var_id: Moon Vector
  • units: meters
  • var_id: Range
  • units: radians
  • var_id: SD Sun azimuth
  • units: radians
  • var_id: SD Sun zenith
  • var_id: SD frames
  • units: seconds
  • var_id: SD start time
  • var_id: SV frames
  • units: seconds
  • var_id: SV start time
  • var_id: Scan Offset
  • units: km IFOV
  • var_id: Scan Type
  • var_id: Scan number
  • units: degrees
  • var_id: SensorAzimuth
  • units: degrees
  • var_id: SensorZenith
  • units: degrees
  • var_id: SolarAzimuth
  • units: degrees
  • var_id: SolarZenith
  • var_id: T_inst2ECR
  • var_id: T_offset
  • units: frame sample time
  • units: km IFOV
  • var_id: Track Offset
  • var_id: WaterPresent
  • units: radians
  • var_id: attitude_angles
  • var_id: attitude_quality
  • units: frame sample time
  • var_id: band_position
  • units: meters
  • var_id: detector_offsets
  • units: meters
  • var_id: detector_space
  • var_id: ephemeris_quality
  • var_id: gflags
  • var_id: impulse_enc
  • units: encoder pulses
  • units: seconds
  • var_id: impulse_time
  • var_id: num_impulse
  • var_id: num_samples
  • units: meters
  • var_id: orb_pos
  • units: meters per second
  • var_id: orb_vel
  • var_id: sun_ref
  • units: degrees
  • var_id: thermal_correction

Co-ordinate Variables

Temporal Range
Start time:
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Geographic Extent