Proceedings of the Symposium on Global and Environmental Monitoring: Proceedings of the Symposium on Global and Environmental Monitoring

Bibliographic data

Multivolume work

Persistent identifier:: 856665355

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts ; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856665355

Language:: English

Document type:: Multivolume work

Volume

Persistent identifier:: 856669164

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Scope:: XIV, 912 Seiten

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856669164

Illustration:: Illustrationen, Diagramme, Karten

Signature of the source:: ZS 312(28,7,1)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [THP-5 IMAGE INTERPRETATION AND ANALYSIS]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: THE INDIAN REMOTE SENSING SATELLITE (IRS-1A) AND ITS APPLICATION POTENTIALS. MG Chandrasekhar, V Jayaraman, K Radhakrishnan, CBS Dutt, B Manikiam, PP Nageswara Rao

Document type:: Multivolume work

Structure type:: Chapter

737 over a particular latitude approximately at the same local time enabling the ground illumination conditions at sub-satellite regions to be constant throughout the mission. The satellite makes 14 orbits per day with a repetitive cycle of 22 days. The orbit of IRS-1A is maintained so that the ground track at the equator will be within 14.8 km across the track from the nominal value. Considering the data quality, attitude pointing accuracies and attitude rate specifications were arrived at (DOS, 1988B). 1.2 The Sensors The imaging sensors onboard IRS-1A and their characteristics in terms of spatial, spectral, ground swath etc. were arrived based on the application needs of various users, and keeping in view the state-of-art technology, consideration of future growth potential, and the need to provide continuity of services to the Landsat MSS and TM users in India and its neighbours. The IRS-1A sensors operate in pushbroom scanning mode using linear CCD arrays and there are four spectral bands in the wavelength regions of 0.45 - 0.52, 0.52 - 0.59, 0.62 - 0.68 and 0.77 - 0.86 microns. There are two types of imaging sensors known as Linear Imaging Self- Scanning Sensor (LISS) : one with a spatial resolution of 72 meters and a swath of 148 kms (designated LISS-I) and other with two separate imaging sensors with a spatial resolution of 36 meters and ground swath of 74 kms each (designated as LISS- IIA & LISS-IIB). A combined swath of 145 kms is provided by the two LISS-II sensors covering the same ground area of LISS-I sensor. The uniqueness in employing individual lens assembly for each spectral band optimises the performance in each spectral band and effectively utilises the full dynamic range of CCDs. Facility exists for controlling the individual band gain through ground command and four selectable gains are available. The input signal in each band is amplified and resolved into 128 radiometric levels. The overall specifications of IRS-1A are given in Table-1. TABLE - 1 : IRS-1A CHARACTERISTICS IRS-1 A SPACECRAFT MAIN FRAME DETAILS Weight Solar Array Battery Data rate Modulation Attitude Sensors Attitude Control Orbit Control Telemetry Telecommand Tracking Approximately 975 Kg : 8 5 sq metres area, employable and sun-tracking panel Generation ol 620 watts at EOL Two Ni-Cd batteries ol 40 AH capacity each : 5 2 Mbps tor LISS-I 2 x 10 4 Mbps tor LISS-II : PCM/BPSK lor LISS-I in S-band PCM/OPSK lor LISS-II in X-band : IR horizon sensors (conical and static), star sensors, sun sensors. Dynamically Tuned Gyros (DTG) : Reaction Wheels (4), magnetic torquers, hydrazine thrusters : Monopropellant hydrazine thrusters. : House Keeping (HK) Information In S-band. PCM/PSK Real time rate 256 bps and play-back rate 4 Kbps Onboard storage capacity ot 98 minutes ot HK data : S-band. PCM/FSK/FM/PM and VHF; PCM/FSK/AM Facility for ON/OFF and Data commands : S-band tone ranging and two way doppler X-band beacon IRS-1 A DATA PRODUCTS TYPE PROCESSING LEVEL FORMAT (mm) LOCATION ACCURACY (1 sigma) TURN AROUND TIME Were) Quick Look Ltveuo (Sun eievaton and Earih rotation corrections) 70 Real time Browse Level-1 (Earth rotation and radiometric corrections) 63x65 HOKms 2 days Stindard Lev*? (Earth rotation. Radrometnc & Geometric corrections) 241 i? 2 Kms 7 days Precision Level-3 (Use ot Ground Control Points) 241 100 mirs 15 days Special Levei-4 (Enhanced Products) 241 Same as the inputs 15 days Computer Compai.ble Tepes (CCT) ol 1600 / 6250 BPI IMAGING SENSORS CHARACTERISTICS LISS 1 LISS-II Focal length (mm) 162 2 324 4 Field-ol-view (deg ) Instantaneous Field ol View. 9 4 47 + 47 IFOV (microrad) 80 40 Delector elements — CCD 2048 2048 Scaning mechanism { Push-Broom Push-Brocm Ground resolution (meler) 72 5 36 25 Spectral range (micro meteT) 0 45-0 86 0 45-0 86 Number of bands 4 4 Swath (Kms) Radiometric resolution 148 74 X 2 (grey levels) 128 128 Data rale (Mbps) 52 104 x 2 Weight (Kgs) 38 5 808 X 2 Power (watts) 34 34 x 2 1RS-1A MISSION DETAILS Type : Polar. Sunsynchronous Altitude : 904 km (near circular) Inclination : 99.05 DEG Local time of Equator crossing : 10.25 a m., at descening node Mission Life : 3 years Launch Date : March 17. 1988 Repetivity : 22 days (307 orbi’s) Ground Track Control ±14 km ol path

Access restriction

Copyright

fullscreen: Proceedings of the Symposium on Global and Environmental Monitoring (Part 1)

Multivolume work

Volume

Chapter

Chapter

Table of contents

Cite and reuse

Volume

Chapter

Image

Image fragment

Citation links

Citation recommendation