IRS-1E
Indian Earth observation satellite
title: "IRS-1E" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["earth-observation-satellites-of-india", "spacecraft-launched-in-1993", "1993-in-india"] description: "Indian Earth observation satellite" topic_path: "geography/india" source: "https://en.wikipedia.org/wiki/IRS-1E" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Indian Earth observation satellite ::
::data[format=table title="Infobox spaceflight"]
| Field | Value |
|---|---|
| name | IRS-1E |
| names_list | Indian Remote Sensing satellite-1E |
| Indian Remote Sensing satellite-P1 | |
| image_size | 300px |
| mission_type | Earth observation |
| operator | ISRO |
| website | https://www.isro.gov.in/ |
| mission_duration | 3 years (planned) |
| Failed to orbit | |
| spacecraft | IRS-1E (P1) |
| spacecraft_bus | IRS-1A |
| manufacturer | Indian Space Research Organisation |
| launch_mass | 846 kg |
| dry_mass | 766 kg |
| dimensions | 1.56 m x 1.66 m x 1.10 m |
| power | 415 watts |
| launch_date | 20 September 1993, 05:12 UTC |
| launch_rocket | Polar Satellite Launch Vehicle (PSLV-D1) |
| launch_site | Satish Dhawan Space Centre, First Launch Pad (FLP) |
| launch_contractor | Indian Space Research Organisation |
| entered_service | Failed to orbit |
| orbit_reference | Geocentric orbit (planned) |
| orbit_regime | Sun-synchronous orbit |
| orbit_periapsis | 817 km |
| orbit_apoapsis | 817 km |
| orbit_inclination | 98.6° |
| orbit_period | 103.0 minutes |
| apsis | gee |
| instruments | Linear Imaging Self-Scanning Sensor-1 (LISS-1) |
| Monocular Electro-Optical Stereo Scanner (MEOSS) | |
| programme | Indian Remote Sensing Programme |
| previous_mission | IRS-1B |
| next_mission | IRS-P2 |
| :: |
| name = IRS-1E | names_list = Indian Remote Sensing satellite-1E Indian Remote Sensing satellite-P1 | image = | image_caption = | image_size = 300px
| mission_type = Earth observation | operator = ISRO | COSPAR_ID = | SATCAT = | website = https://www.isro.gov.in/ | mission_duration = 3 years (planned) Failed to orbit
| spacecraft = IRS-1E (P1) | spacecraft_type = | spacecraft_bus = IRS-1A | manufacturer = Indian Space Research Organisation | launch_mass = 846 kg | dry_mass = 766 kg | dimensions = 1.56 m x 1.66 m x 1.10 m | power = 415 watts
| launch_date = 20 September 1993, 05:12 UTC | launch_rocket = Polar Satellite Launch Vehicle (PSLV-D1) | launch_site = Satish Dhawan Space Centre, First Launch Pad (FLP) | launch_contractor = Indian Space Research Organisation
| entered_service = Failed to orbit | disposal_type = | deactivated = | last_contact =
| orbit_reference = Geocentric orbit (planned) | orbit_regime = Sun-synchronous orbit | orbit_periapsis = 817 km | orbit_apoapsis = 817 km | orbit_inclination = 98.6° | orbit_period = 103.0 minutes | apsis = gee
| instruments = Linear Imaging Self-Scanning Sensor-1 (LISS-1) Monocular Electro-Optical Stereo Scanner (MEOSS)
| programme = Indian Remote Sensing Programme | previous_mission = IRS-1B | next_mission = IRS-P2
IRS-1E was an Earth observation mission launched under the National Natural Resources Management System (NNRMS) programme by Indian Space Research Organisation (ISRO). Sometimes written IRS-P1. The objective of the mission was to develop Earth imagery using instruments carried on board. Due to a malfunction of the launch vehicle, the satellite deviated from its path and plunged into the Indian Ocean.
History
IRS-1E was a follow-up mission to the satellite IRS-1A, to develop India's capability in the field of remote sensing. The satellite was to take up missions in the area of ground-water exploration, land use, forest and flood mapping. The letter "E" indicates that the satellite was an engineering model. The letter "P" (IRS-P1) in the Indian Remote Sensing Programme of Earth observation satellite indicates that the satellite was to be launched aboard a Polar Satellite Launch Vehicle (PSLV). It was launched on 20 September 1993.
Instruments
IRS-1E carried two instruments:
- Linear Imaging Self-Scanning Sensor-1 (LISS-1)
- MEOSS (Monocular Electro-Optical Stereo Scanner), built by the German Aerospace Center (DLR), is an experimental sensor with pushbroom Charge-coupled device (CCD) technology. MEOSS is a stereo camera system capable of recording three images simultaneously with a single lens by means of linear scanning (3-line stereo system).
Launch
IRS-1E mission was a failure, as the last stage of the PSLV-D1 malfunctioned, so failed to launch the satellite into its desired orbit. The PSLV was first launched on 20 September 1993, at 05:12 UTC. The first and second stages performed as expected, but an attitude control problem led to the collision of the second and third stages at separation, and the satellite failed to reach orbit. After this initial setback, the PSLV successfully completed its second mission in 1994.
References
References
- (7 October 2005). "Program: IRS". Weebau.
- "IRS-P3". ESA Earth Online.
- "IRS-1E". ISRO.
- (28 July 2015). "IRS-1A". WMO.
- "IRS (Indian Remote Sensing Satellites)". ESA Earth Observation Portal.
- "India (Launchers)". Spacecraft Encyclopedia.
- (7 July 2020). "IRS-1E (IRS-P1)". Gunter's Space Page.
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