What are the sensor/product specifications?

LandSat -8 Data product details : L1T

The level-1 terrain-corrected product (L1T) available to users is a radiometrically and geometrically corrected image. Inputs from both the sensors and the spacecraft are used, as well as ground control points (GCPs) and digital elevation models. The end result is a geometrically rectified product free from distortions related to the sensor (e.g. view angle effects), satellite (e.g. attitude deviations from nominal), and Earth (e.g. rotation, curvature, relief). The image is also radiometrically corrected to remove relative detector differences, dark current bias, and some artifacts. The level one image is presented in units of Digital Numbers (DNs) which can be easily rescaled to spectral radiance or top of atmosphere (TOA) reflectance . Surface reflectance products are also generated from L1T products.

Level 1 Product

A complete level 1 product consists of 13 files :

The Landsat 8 Cloud Cover Assessment (CCA) system uses multiple algorithms to detect clouds in scene data. Each CCA algorithm creates its own pixel mask that labels clouds, cirrus, and other classification types. The separate pixel masks are then merged together into the final level 1 quality band.

The image files are all 16-bit GeoTIFF images.

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Sentinal 1A/1B : Interferometric Wide swath mode (IW)









Level 1, GRD

IW mode-250km


5*20m spatial


12 day only 1a or 1b , 6days combined

Spatial reference system :

Fiji 1986 Grid(EPSG 3460))

Level 1 products are focused using algorithms and calibration data. They can be SLC or GRD products which are georeferenced using a DEM, but are not orthorectified



Swath width

250 km

Incidence angle range

29.1° - 46.0°



Azimuth steering angle

± 0.6°

Polarisation options

Single HH, VV

Maximum Noise Equivalent Sigma Zero (NESZ)

-22 dB

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Sentinal 2A/2B – Level-1C - Orthorectified Top Of Atmosphere











10,20,60 m band wise

Systematic coverage

10 day sen2a or 2b, 5 days combined

100km* 100km tiles Military Grid Reference system(MGRS) 29,782 tiles were identified

SENTINEL-2 is a wide-swath, high-resolution, multi-spectral imaging mission, supporting Copernicus Land Monitoring studies, including the monitoring of vegetation, soil and water cover, as well as observation of inland waterways and coastal areas.

SENTINEL-2 Multispectral Instrument (MSI) samples 13 spectral bands: four bands at 10 metres, six bands at 20 metres and three bands at 60 metres spatial resolution.

Level-1C processing includes radiometric and geometric corrections including ortho-rectification and spatial registration on a global reference system with sub-pixel accuracy.

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By When is Data made available :

Generally Data is made available within 24 hours . The sentinel series is available as per the availability on the ESA site .

How is this data product different from NOEDA of Bhuvan?


Data is made available and priced as per ISRO Remote Sensing Data pricing policy .


Which Open source image processing software tools can be used?

GDAL Library, QuantumGIS for analytics features for both raster and vector, available for both windows and linux. (ArcGIS, ERDAS are proprietary software with such capabilities).

Is it possible to get training for working with these images?

Yes , The Training and outreach services are available : Training Division of Remote Sensing Applications Area is engaged in Capacity Building of user community from various Government/Private/NGOs/Academic Organizations and Institutions in the Area of Geospatial Technology and its Applications, Remote Sensing Ground systems and Navigation systems. Every year we conduct Regular, Special and customized courses to impart training to people working in the domain of Geospatial Applications. Further Bhuvan overview training programmes are also organized for users to increase awareness towards effective utilization of Bhuvan Portal Services. Email id for Correspondence: training[at]nrsc[dot]gov[dot]in

Are there any case studies?

Yes ,
Student Projects and work: mailto: gmoutreach[at]nrsc[dot]gov[dot]in


How to get free access to earth observation data from NRSC?

The link to Bhoonidhi web application is available at The landing page has a link to free access providing web application - Bhoonidhi.

Does this URL work on Mobile devices?

Yes the application works on mobile also.

Is user registration compulsory?

For browsing through the products catalogue user login is not required. But if the user wishes to download the products, registration is compulsory. Due to any reason if after registration you are not able to login, please wait for 15 minutes and retry.

What is a CART?

A Cart is a temporary storage unit to store products of interest for eventual download. User can add/delete selected products to the Cart. Date wise viewing of Cart items is also provided. User has to confirm the items in the Cart. On doing so, the download button is enabled. Selected products can be then directly downloaded from the Cart. In case of delayed download, user will be intimated once the product is available for online download.

I have some suggestions with regards to your service. Where should I post it?

You can fill the feedback form provided at our website. You can also write to us at bhoonidhi[at]nrsc[dot]gov[dot]in

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