Validation of INSAT‐3D and INSAT‐3DR Temperature Profile Retrievals Using Ground‐Based, Satellite, and Reanalysis Data

Nowcasting and short‐range predictions of severe weather events require frequent observations of atmospheric thermodynamic state. To meet these requirements, India has launched a series of advanced weather satellites in geostationary platform, with Indian National Satellite System (INSAT)‐3D and INS...

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Bibliographic Details
Published in:Journal of geophysical research. Atmospheres 2023-11, Vol.128 (22), p.n/a
Main Authors: Gopikrishnan, G. S., Kuttippurath, J., Thapliyal, P. K., Shukla, M. V.
Format: Article
Language:English
Subjects:
Accuracy
AIRS
Algorithms
Atmospheric conditions
Atmospheric Infrared Sounder
Bias
Data analysis
Drought
Extreme weather
Geophysics
Geosynchronous orbits
Heat waves
Heatwaves
IGRA
Indian space program
Indian spacecraft
INSAT‐3D
INSAT‐3DR
Lower troposphere
Meteorological observations
Meteorological satellites
Monitoring
Nowcasting
Radiative transfer
Radiosondes
Remote observing
Satellite data
Satellite monitoring
Satellite observation
Satellites
Severe weather
Space research
Spatial discrimination
Spatial resolution
Storms
temperature
Temperature measurement
Temperature monitoring
Temperature profile
Temperature profiles
Temporal resolution
Troposphere
Upper troposphere
validation
Vertical profiles
Weather
Weather patterns
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Summary:Nowcasting and short‐range predictions of severe weather events require frequent observations of atmospheric thermodynamic state. To meet these requirements, India has launched a series of advanced weather satellites in geostationary platform, with Indian National Satellite System (INSAT)‐3D and INSAT‐3DR as first two satellites placed in this orbit. Both satellites are designed for meteorological observations, particularly the vertical profiles of temperature and humidity at hourly intervals. As these satellites are relatively new, there is a need to validate and make accuracy assessment of their retrievals prior to scientific analyses. These sounders have a spatial resolution of 10 km, and measurements are available from 2014 to date. This study makes use of collocated measurements of INSAT‐3D and INSAT‐3DR with those from 18 radiosondes, Atmospheric Infrared Sounder (AIRS), and reanalysis data within the troposphere (1,000–100 hPa) to validate INSAT data. We analyzed the data for India land regions, and found an average bias of about 2–3 K (1–1.5 K) in most regions, when INSAT‐3D (3DR) is compared to AIRS measurements. Compared to the reanalysis data, INSAT‐3D (3DR) shows a bias within 2.5–5 K (2–3 K) in lower troposphere, 1.5–2.5 K (1–2 K) in mid‐troposphere and 1.5–2.5 (
ISSN:2169-897X
2169-8996
DOI:10.1029/2023JD038912