1. INSAT-3D CAL/VAL Site Joint Campaign Observations Data Analysis GSICS meeting dated 25-3-2014 By A.K. Sharma,Dr.Senthil Kumar,Dr Hiren Bhatt,Dr.A.D.Jeyaseelan, Mr.A.K. Mitra,Dr.S.Mishra,Dr.R.Agnihotri,Dr.Gopalkrishnan Ms.Shailesh Parihar

2. INSAT-3D - India’s Advanced Weather Satellite India's advanced weather satellite INSAT- 3D was launched in the early hours of July 26, 2013 from Kourou, French Guyana, and has successfully been placed in Geosynchronous orbit. It carries four payloads  Imager (Six Channels)  Sounder (Nineteen Channels)  Data Relay Transponder(DRT)  Satellite Aided Search and Rescue (SAS & R )

3. INSAT 3D satellite Imager Channels Spectral BandWave- length(µm) Ground Resolution Visible0.55-0.751 km SWIR1.55-1.701 km MIR3.80-4.004km WV6.50-7.108km TIR110.2-11.34km TIR211.5-12.54km

4. 24/03/14 4

5. 03/24/145 Geophysical Parameters derived from INSAT -3D satellite No.ParametersNo. Parameters 1.Outgoing Long wave Radiation (OLR)9.Water Vapor Wind (WVW) 2. Quantitative Precipitation Estimation ( QPE),IMSRA,Hydro Estimator 10.Upper Tropospheric Humidity (UTH) 3.Sea Surface Temperature (SST)11. Temperature, Humidity profile & Total ozone 4.Snow Cover12. Stability indices from sounder data LI,WI,DMBI,TT 5.Fire13.Normalized Difference snow Index 6.Smoke14.Flash Flood Analyzer, Hydro-estimator 7.Aerosol15. FOG (day and night) 8.Cloud Motion Vector (CMV),Visible winds16.Tropical Cyclone-intensity /position

6. Calibration/Validation of INSAT 3D  First data came of INSAT 3D in August 2013.  Every satellite (e.g. IRS) sensor undergoes pre-flight calibrations.  Once in space, degradation in the sensitivity of the optics of the telescope and the scanning mirror causes a change in the calibration of the cameras. To get the maximum from satellite data derived products, sensors must be regularly calibrated, the data validated, and the stability and quality of the data ensured [Bannari et al., 2005]. The main objective of calibration is to find new gain and offset coefficients for every sensor (in each band).

7. Calibration: According to Committee on Earth Observation Satellite (CEOS), calibration is the process of quantitatively defining the system response to known, controlled signal inputs and validation is the process of assessing by independent means the quality of the data products derived from the system outputs [Teillet et al., 1997]. A joint-campaign for establishing a natural land based Cal/Val site for INSAT- 3D satellite for visible and SWIR channels has been carried out at Jaisalmer site,India with NRSC-Hyderabad, RRSC-Jodhpur, SAC (ISRO)- Ahmadabad, IITM-Pune, IMD-Pune and NPL-New Delhi scientists during 15-23 December, 2013. The outcome of the observations will be finalized soon.

8. Site Properties  Lowest Rainfall  Less cloudy days  Easily approachable  Far from Sea  Considerably plain land

21. Results 1. Mean variation of reflectance pixelwise is less in VIS (4-6%)than SWIR (5-7%). 2. Atmospheric parameters observed are almost showing little variationduring the campaign : AOD= 0.379 +/- 0.064 ; O3=249.96 +/- 13.99; WV=0.46 +/- 0.11. 3.INSAT-3D and 6S radiances show differences of 25.57% in VIS and 8.49% in SWIR. 4.Overall variation in reflectance has been observed as 10-26% in VIS and 10-21% in SWIR. Future Action: To make the site uniform manually or search some other site.