NDLI: Optical Development System life cycle for the ICESat-2 ATLAS instrument

Content Provider	IEEE Xplore Digital Library
Author	Evans, T.
Copyright Year	2014
Description	Author affiliation: SGT, Inc., Greenbelt, MD, USA (Evans, T.)
Abstract	The Optical Development System Lab (ODSL) completed a cycle of prototype testing and engineering model integration models to successfully test out a closed loop optical design. Through this process many lessons have been learned that are being directly applied to flight integration and testing, helping drive down risk, cost, and schedule for the instrument. The ODSL was used to test and understand the functional performance of the transmitter to receiver alignment system concepts. Advanced Topographic Laser Altimeter System (ATLAS) is the instrument being tested by the ODSL and is the main instrument on the ICESat-2 mission. It measures ice elevation by transmitting laser pulses, and collecting the reflection in a telescope. Because the round trip time is used to calculate distance, alignment between the outgoing transmitter beam and the incoming receiver beams are critical. An automated closed loop monitoring control system is currently being tested at the engineering model level to prove out implementation for the final spacecraft. To achieve an error of less than 2 micro-radians, an active deformable mirror was used to correct the lab wave front from the collimated “ground reflection” beam. The lab includes a focal plane assembly set up, a one meter diameter collimator optic, a 0.8 meter flight spare telescope for alignment, and the appropriate flight software to control the transmit beam path. By having a fully integrated system with prototypes and engineering units, lessons were learned before flight designs were finalized. The flight telescope is now ready to be accepted and put through tests that were refined with the ODS lab.
Sponsorship	IEEE Aerosp. Electron. Syst. Soc.
Starting Page	1
Ending Page	12
File Size	3123811
Page Count	12
File Format	PDF
e-ISBN	9781479916221
DOI	10.1109/AERO.2014.6836306
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-03-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical imaging Integrated optics Optical filters Optical fibers Biomedical optical imaging Optical design
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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