AstroSat is India’s first dedicated multi wavelength space observatory. This scientific satellite mission endeavours for a more detailed understanding of our universe. One of the unique features of AstroSat mission is that it enables simultaneous multi-wavelength observations of various astronomical objects with a single satellite.

The main scientific objectives of AstroSat mission are:


AstroSat - Payloads

The scientific payload on-board Astrosat are Ultra Violet Imaging Telescope (UVIT), Soft X-ray Telescope (SXT), Large Area X-ray Proportional Counter (LAXPC), Cadmium-Zinc-Telluride Imager (CZTI) and Scanning Sky Monitor (SSM). Know more.

ToO Proposal Data

AstroSat - ToO Proposal Data

Target of Opportunity (ToO) Proposal Data: Preliminary Dataset can be accessed through GADS (Generalized Access and Dissemination System). Click here


AstroSat - Broucher

AstroSat brochure released during its launch containing about PSLV-C30, AstroSat, international customer satellites of PSLV –C30 and satellites of other countries launched by PSLV is available here


AstroSat - APPS

AstroSat Proposal Processing System (APPS) is a web based proposal processing software for the Astrosat mission that facilitates the proposal driven operations and participation of the scientific community. To submit a proposal Click here

Data Usage Guidelines

AstroSat - Data Usage Guidelines

The observations will be planned as per mission scheduling. The PI will be informed, after the completion of successful observation for the downloading of processed Level-1 data. Know More

Proposer's Guide

AstroSat - Proposer's Guide

This document assists the proposers with the AstroSat proposal preparation and submission using the APPS software, it also acts as the proposers’ manual for the APPS software. Download


AstroSat - Astroviewer

This is a web-based tool that proposers need to use in order to determine AstroSat visibility period for observations of a target of interest. Access here

LaTex Template

AstroSat - LaTex

Download the Astrosat proposal Scientific justification template here and Technical justification template here.


Web based Portable Interactive Multi-Mission Simulator (WebPIMMS): to estimate the source count rates Click here


AstroSat - ASV

Astrosat Schedule Viewer (ASV): To view the Astrosat obseravtion schedule infomation Click here


AstroSat - HandBook

AstroSat Handbook describes the technical details of the payloads on-board AstroSat. Access here


AstroSat - Astrobrowse

The science data from observations made by the instruments on board the spacecraft are available for download after the proprietary period from this portal. Access here


AstroSat - SSM Web

A catalog of the sources detected by SSM and the light curve data file for every source detected can be obtained from this website. Access here


AstroSat - RedBook

To access the Astrosat Proposal Redbook, that gives the details of sources observed and accepted/scheduled for AstroSat observations, Click here

Image Gallery

AstroSat - Image Gallery

Image Gallery