B. N. RAMAKRISHNA
Articles written in Journal of Astrophysics and Astronomy
Volume 42 All articles Published: 28 May 2021 Article ID 0021 MISSION
AstroSat is India’s first dedicated astronomical observatory in space with multi-wavelength payload on a single platform. It enables simultaneous observations in the desired wavebands. The increase in the number of payloads has also led to an increase in the complexity in space segment design, groundsegment design, and mission operation management. Each payload instrument and mainframe has its own constraint for the operation, which needs to be satisfied to ensure the safety of the systems. In this paper, we explain the challenges in ground operations for mission management with various constraints. Also, we list the various constraints, both geometric and otherwise, with respect to the mainframe systems and payload instruments of AstroSat.
Volume 42 All articles Published: 31 May 2021 Article ID 0027 MISSION
AstroSat Proposal Processing System (APPS) is a mission critical software solution designed and developed by the joint efforts of Indian Space Research Organization and the Inter-University Centre for Astronomy and Astrophysics. It facilitates the participation of global scientific community to submit scientificproposals for observations with India’s first multi-wavelength space observatory. The software systematizes the proposal submission and review process before the successful proposed observations are scheduled to carryout scientific observations. This paper describes the overall architecture of the system,implementation stratagems, administrative aspects and security aspects of the software. The paper also describes the techniques adopted for seamless day-to-day operations in meeting the mission requirements. As a future direction, the paper summarizes the roadmap for development of a generic multi-mission proposal handling model from the experiences gained through APPS.
Volume 42 All articles Published: 11 June 2021 Article ID 0043 MISSION
The ground data processing, archival and dissemination of the science data for India’s first multi wavelength astronomical spacecraft, AstroSat is carried out from Indian Space Science Data Centre (ISSDC). The proposals submitted by users worldwide are grouped into observations and are observed inmultiple orbit segments. Large volume of data in various configurations from different payloads and the inherent diversity of data products resulting from observations had demanded intricate procedures in handling the data processing, archival and dissemination scenario at ISSDC. The paper describes the layered approach followed in implementing a software stack for establishing and operating a completely automated pipeline for data processing, archival and dissemination of astronomical data. The operations of the automated pipeline, challenges faced during the implementation and the strategies adapted to overcome them are also summarized.
Volume 42, 2021
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