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Studies of earth's atmosphere from space and near space (Record no. 19389)

MARC details
000 -LEADER
fixed length control field 02997nam a2200217Ia 4500
003 - CONTROL NUMBER IDENTIFIER
control field IN-BaIIA
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20211110111448.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 211028s9999 xx 000 0 eng d
040 ## - CATALOGING SOURCE
Transcribing agency IIA Library
100 ## - MAIN ENTRY--PERSONAL NAME
Personal name Sreejith, A.G
9 (RLIN) 37067
Relator term Author
245 #0 - TITLE STATEMENT
Title Studies of earth's atmosphere from space and near space
Statement of responsibility, etc. A.G. Sreejith
Medium [Ph.D Thesis]
260 ## - PUBLICATION, DISTRIBUTION, ETC.
Place of publication, distribution, etc. Bangalore
Name of publisher, distributor, etc. Indian Institute of Astrophysics
Date of publication, distribution, etc. 2017
300 ## - PHYSICAL DESCRIPTION
Extent xvi, 134p.
502 ## - DISSERTATION NOTE
Degree type Doctor of Philosophy
Name of granting institution Indian Institute of Astrophysics, Bangalore
Year degree granted 2017
520 ## - SUMMARY, ETC.
Summary, etc. We are conducting high-altitude balloon experiments at Indian Institute of Astrophysics using small scientific payloads for atmospheric and astronomical studies. The ultraviolet (UV) window has been largely unexplored through balloons for astronomical observations. This thesis describes the basic instrumentation developed for the balloon experiments including the tracking, telemetry, and flight termination. The current observations are of atmospheric trace gases, as they provide valuable information about the state of the Earth's upper atmosphere. The trace gas retrieval is carried out using DOAS (Differential Optical Absorption Spectroscopy) technique from scattered solar light observations. We have developed a lightweight compact portable unit for measurement of trace gas strengths from ground and airborne platforms. It is essential to understand the orientation of the payload and the direction of observation for any scientific study. To achieve this, we have developed a lightweight low-cost attitude sensor, based on a Raspberry Pi, built with readily available commercial components which can provide an accuracy of ±0:240. It can be used in experiments where weight and power are constrained, such as in light-weight high-altitude balloons. We are using the attitude sensor as the major building block in a closed-loop control system with driver motors, to stabilize and point cameras and telescopes for observations from a balloon-borne payload. The thesis also describes the details of other instruments developed for balloon experiments, one of which is a near UV spectrograph. The spectrograph is a modified Czerny-Turner design in the wavelength band of 250 nm to 400 nm. The system uses an image intensified CMOS as the detector and is designed to be portable and scalable for different telescopes. It is important to simulate the ultraviolet sky for future ultraviolet space missions and for this, we have developed a sky simulator tool. The software is available as a downloadable package and as a web-based tool. The thesis also contains a description of the time series analysis of airglow observations from FUSE (Far Ultraviolet Spectroscopic Explorer).
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element Earth's atmosphere
9 (RLIN) 37068
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element Space
9 (RLIN) 3725
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name Jayant Murthy
9 (RLIN) 37069
Relator term Supervisor
856 ## - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="http://prints.iiap.res.in/handle/2248/6860">http://prints.iiap.res.in/handle/2248/6860</a>
Link text Click Here to Access eThesis
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type Thesis & Dissertations
Source of classification or shelving scheme Universal Decimal Classification
Holdings
Withdrawn status Lost status Source of classification or shelving scheme Damaged status Not for loan Home library Current library Shelving location Date acquired Source of acquisition Barcode Date last seen Price effective from Koha item type
    Universal Decimal Classification     IIA Library-Bangalore IIA Library-Bangalore General Stacks 28/12/2018 ANJ 20311 05/11/2021 28/12/2018 Thesis & Dissertations

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