The critical imaging instrument of the ambitious GEO Imaging Satellite (GISAT) is being developed in Ahmedabad. Space application Centre (SAC) director padma shri AS Kiran Kumar told that the payload is capable of visible infrared imaging and Hyperspectral imaging, which are critical to the functioning of the GISAT.
I just noticed that GISAT is meant to be injected directly into GEO and has no Apogee propulsion system (Source). If so, I believe this would be the first time ISRO attempts a direct GEO insertion for is spacecrafts. Any idea if they are planning to use PAM-G for this?
GISAT spacecraft is configured using I1K bus compatible with PAM-G/GSLV launch vehicle.
"Bus" referrs in this context to the satellite structure, propulsion system, AOCS, power systems etc. - essentially all satellite systems except for the payload. The I1K bus to be used here is a (more or less) standardized satellite bus, which has already been used for communications, navigation and meteorology missions. http://space.skyrocket.de/doc_sat/isro_i1k.htm
Upcoming GISAT-1 and GISAT-2 : http://nrsc.gov.in/sites/all/pdf/GISAT-UIM-3Jan2016_V3_Alok_2.pdf
https://www.thehindu.com/news/national/starting-may-isro-to-launch-a-string-of-defence-satellites/article26714439.ece
https://www.newsstate.com/science-tech/news/enemies-of-india-exposed-by-cartosat-3-satellite-isro-wil-launch-soon-98320.htmlGISAT-1 (New): September 2019<snip>
https://timesofindia.indiatimes.com/india/mini-pslv-testflight-only-after-chandrayaan-2-moonlanding-isro-chief/articleshow/70368911.cmsQuoteThe SSLV testflight will now happen only after the Chandryaan 2 lands on Moon as per scheduled date on September 7.”...“After Chandrayaan-2, the next launch will now be of Cartosat-3 satellite in October,” [ISRO Chairman K] Sivan told TOI....
The SSLV testflight will now happen only after the Chandryaan 2 lands on Moon as per scheduled date on September 7.”...“After Chandrayaan-2, the next launch will now be of Cartosat-3 satellite in October,” [ISRO Chairman K] Sivan told TOI....
http://timesofindia.indiatimes.com/articleshow/71204379.cms?utm_source=contentofinterest&utm_medium=text&utm_campaign=cppstQuote<snip>[Somanath] said, Isro is getting ready for next launches like PSLV C47 and 48, GSLV F10.<snip>
<snip>[Somanath] said, Isro is getting ready for next launches like PSLV C47 and 48, GSLV F10.<snip>
Quote from: Salo on 09/21/2019 05:03 amGISAT-1 Late 2019:https://www.patrika.com/bangalore-news/isro-will-launch-new-series-of-remot-sensing-satellites-5101666/Quote from that source via Google translate:QuoteAccording to ISRO's highly placed sources, the launch of GISAT-1 is expected by the end of this year. It will be launched by GSLV MARK-2 rocket from Satish Dhawan Space Center at Sriharikota. ISRO has given priority to this satellite, prioritizing future missions. After the launch of CARTOSAT-03 by the end of October, the GISAT mission will be emphasized.
GISAT-1 Late 2019:https://www.patrika.com/bangalore-news/isro-will-launch-new-series-of-remot-sensing-satellites-5101666/
According to ISRO's highly placed sources, the launch of GISAT-1 is expected by the end of this year. It will be launched by GSLV MARK-2 rocket from Satish Dhawan Space Center at Sriharikota. ISRO has given priority to this satellite, prioritizing future missions. After the launch of CARTOSAT-03 by the end of October, the GISAT mission will be emphasized.
ISRO Director: This is the last mission for ISRO this year.
GISAT-1 launch January 15:https://aajtak.intoday.in/gallery/india-isro-will-launch-gisat-1-in-january-balakot-pakistan-telescope-tstr-2-43223.htmlhttps://www.gstv.in/every-30-minutes-india-will-get-a-picture-from-the-sky-isro-is-going-to-form-a-new-history-gujarati-news/
What does the "GM" stand for?
Another question to ask: does the fairing’s new ogive shape have to do with weight reduction?Something’s telling me that the new fairing is being constructed with lightweight material.
Quote from: ZachS09 on 12/23/2019 03:10 pmAnother question to ask: does the fairing’s new ogive shape have to do with weight reduction?Something’s telling me that the new fairing is being constructed with lightweight material.The new payload fairing is made up of composite material so yes it will be lighter. But main benefits of new payload fairing will be increased payload bay space and reduced aerodynamic stress on the vehicle during the atmospheric phase of flight. The GSLV Mk-3 also underwent a similar change between the X and D1 missions with it's heatshield also being changed to a composite based ogive design.
So, PAM-G still planned onboard?
So....will there be any ISRO launch this month (or the next) at all?
GISAT-1 launch February 10-16 :https://aajtak.intoday.in/story/india-will-launch-gisat-1-satellite-in-valentine-s-day-week-2020-gift-tstr-1-1158455.htmlhttps://www.gstv.in/isro-will-launch-countrys-first-gisat-1-satellite-gujarati-news/https://www.newsone11.in/isro-will-give-the-countrys-best-gift-will-be-launched-in-february/https://bengali.mahanagar24x7.com/isro-will-launch-gisat-1-satalight-to-space-in-february/
So, erm, any NOTAMs or other notices for this flight yet?
ISRO To Launch GISAT-1 Earth Observation Satellite On 28th Feb, 2020http://www.indiandefensenews.in/2020/02/isro-to-launch-gisat-1-earth.htmlTo at 5:30 am (LT) (00:00 UTC)
श्रीहरिकोटा स्थित सतीश धवन अंतरिक्ष केंद्र (एसडीएससी) शार, में भू-अवलोकन उपग्रह जीआइसैट-1 के प्रक्षेपण की तैयारियां चल रही हैं। इस उपग्रह का प्रक्षेपण इसी महीने के अंत तक होने की संभावना है। इसे भू-स्थैतिक प्रक्षेपण यान (जीएसएलवी-मार्क-2 एफ-10) से लांच किया जाएगा।
Preparations are underway to launch the Earth Observation Satellite GIAT-1 at Satish Dhawan Space Center (SDSC) SHAR, Sriharikota. The launch of this satellite is expected by the end of this month. It will be launched with a Geostationary Launch Vehicle (GSLV-Mark-2F-10).
First pictures coming from Shriharikota of the Assembly of GSLV MK2 F-10 (looks like a picture from dec-jan).The launch is on 5th March.
https://www.isro.gov.in/launcher/gslv-f10-gisat-1From ISRO's website, March 5th launch confirmed. Weight/mass of GISAT-1 higher( 2275kg) than figure given last week( 2100kg) in ISRO's annual report.
most of the times, the 100% sure confirmation is when ISRO starts posting rocket integration images online.
Here’s an opportunity to witness the launch of GISAT-1 by GSLV-F10 LIVE at 1743 Hrs IST on March 05, 2020 from our spaceport at SriharikotaRegister yourself at https://bit.ly/32togAi from 1000 Hrs onwards on February 28, 2020
https://www.isro.gov.in/gslv-f10-gisat-1/gslv-f10-gisat-1-galleryPic of the fully assembled GSLV on way to launch pad.
https://www.indiatoday.in/science/story/isro-gisat1-gslv-f10-geo-imaging-satellite-earth-observation-launch-1650919-2020-02-28A photo of GISAT-1 between two halves of the heat shield
According to updated NOTAM launch date is now march 16th. Source: https://old.reddit.com/r/ISRO/comments/fea1zb/gslv_f10_gisat1_second_launch_attempt_notam_is/
NOTAM for potential Mar 16 launch has been withdrawn so the technical issue causing delay from Mar 5 presumably needs extended fix time
Coronavirus has impacted work on the rocket at SHAR. Work on the rocket was stopped following orders received from ISRO headquaters. GSLV F10 was taken to the VAB last week and the GISAT-1 satellite was detached and moved to Satellite Preparation Building#2 on Thursday.
QuoteGOVERNMENT OF INDIAMINISTRY OF SPACERAJYA SABHAUNSTARRED QUESTION NO-2193ANSWERED ON-12.03.2020Progress to launch GISAT 1 and Chandrayaan 32193 . Shri B. Lingaiah Yadav(a) Whether ISRO made progress and preparations to launch GISAT-1 and also for Chandrayaan-3; and(b) If so, the details thereof and progress made?ANSWERTHE MINISTER OF STATE IN THE MINISTRY OF PERSONNEL, PG &PENSIONS AND IN THE PRIME MINISTER’S OFFICE(DR. JITENDRA SINGH):(a) & (b) GISAT-1 satellite is the next immediately planned launch for ISRO. Chandrayaan-3 configuration has been finalized. Hardware realizations are in progress. Launch is planned in the year 2021.
GOVERNMENT OF INDIAMINISTRY OF SPACERAJYA SABHAUNSTARRED QUESTION NO-2193ANSWERED ON-12.03.2020Progress to launch GISAT 1 and Chandrayaan 32193 . Shri B. Lingaiah Yadav(a) Whether ISRO made progress and preparations to launch GISAT-1 and also for Chandrayaan-3; and(b) If so, the details thereof and progress made?ANSWERTHE MINISTER OF STATE IN THE MINISTRY OF PERSONNEL, PG &PENSIONS AND IN THE PRIME MINISTER’S OFFICE(DR. JITENDRA SINGH):(a) & (b) GISAT-1 satellite is the next immediately planned launch for ISRO. Chandrayaan-3 configuration has been finalized. Hardware realizations are in progress. Launch is planned in the year 2021.
https://www.eenadu.net/nationalinternational/mainnews/general/7/220046063 [dated March 13]QuoteCoronavirus has impacted work on the rocket at SHAR. Work on the rocket was stopped following orders received from ISRO headquaters. GSLV F10 was taken to the VAB last week [March 1-7] and the GISAT-1 satellite was detached and moved to Satellite Preparation Building#2 on Thursday [March 12].
Coronavirus has impacted work on the rocket at SHAR. Work on the rocket was stopped following orders received from ISRO headquaters. GSLV F10 was taken to the VAB last week [March 1-7] and the GISAT-1 satellite was detached and moved to Satellite Preparation Building#2 on Thursday [March 12].
GISAT-1 is now expected to launch on April 1, 2020
The Vikram Sarabhai Space Centre (VSSC) has asked staff to stay home from Monday onwards in view of the COVID-19 situation.
In this flight, a 4 metre diameter Ogive shaped payload fairing (OPLF) is being flown for the first timein GSLV to accommodate a larger spacecraft.
Efforts are being made to complete the PSLV C49 experiment by December this year. In addition, the PSLV C50 and the GSLV F10, which was postponed to the last minute on March 5 this year, is scheduled to be completed by the end of March 2021.
Next launch is PSLV C50 with "CMS 01" followed by first SSLV with "EOS 02" and GSLV F10 with "EOS 03".End of webcast.
The GSLV carrying GISAT-1 is expected to fly after PSLV C50.
https://www.business-standard.com/article/current-affairs/pslv-c50-lifts-off-successfully-with-communication-satellite-cms-01-120121700767_1.html
The GSLV rocket was dismantled after the [March 5, 2020] launch was called off, and is being refurbished. The rocket's cryogenic engine has been brought down and it is being readied again.
Quote from: Salo on 12/29/2020 02:38 pmGisat-1 will be launched in february:https://www.patrika.com/bangalore-news/gisat-1-will-be-launched-in-feb-now-6592185/Stephen Clark yesterday reported the launches vice versa: PSLV C51 in late February and GSLV/GISAT-1 NET March: https://spaceflightnow.com/launch-schedule/Hard to tell if he has some never information than that Partica article of Dec 24, or older.<snip>
Gisat-1 will be launched in february:https://www.patrika.com/bangalore-news/gisat-1-will-be-launched-in-feb-now-6592185/
Ongoing SSLV preparations take the FLP out of play for other launches. Both launches, of Amazonia and GISAT-1, will apparently stage from the SLP.The open question is: which is first, and which follows?
Quote from: zubenelgenubi on 12/29/2020 07:56 pmOngoing SSLV preparations take the FLP out of play for other launches. Both launches, of Amazonia and GISAT-1, will apparently stage from the SLP.The open question is: which is first, and which follows?The next launch is Amazônia-1. Presumably GISAT-1 will follow.https://forum.nasaspaceflight.com/index.php?topic=50228.msg2169645#new
"We are looking to launch this Geo imaging satellite on March 28, subject to weather conditions", an official of the Bengaluru-headquartered Indian Space Research Organisation (ISRO) told PTI on Sunday.
TOI, Isro aims for 7 more launches from India in 2021, updated March 12
Folks ! Is the launch of GISAT-1 still scheduled for next Sunday 28th March ? If so, when will we know on the exact launch details ?
New launch date is April 18thhttps://economictimes.indiatimes.com/news/science/isro-revises-launch-schedule-of-gisat-1-after-minor-issue-with-satellite/articleshow/81711431.cmsThe Indian Space Research Organisation has revised the launch schedule of geo imaging satellite GISAT-1 on board GSLV-F10 rocket following a "minor issue" with the spacecraft.The Bengaluru-headquartered space agency was earlier looking to launch the satellite on March 28, subject to weather conditions."There is a minor issue with the satellite", ISRO sources told PTI."As of now, we are planning to launch it on April 18".GISAT-1 was originally planned to be ..
The PMO intervened because pressure came from Washington.
“The satellite has some voltage fluctuation issue which is delaying the launch," one scientist in the know told TOI.
https://timesofindia.indiatimes.com/india/voltage-issue-further-delays-launch-of-gisat-1/articleshow/81993758.cms
"We are working on the problem and the launch should happen in the last week of this month [April], or may even get pushed to May," a scientist said.
More delay to be expected for this launch due to the pandemichttps://react.etvbharat.com/telugu/andhra-pradesh/city/nellore/works-suspension-in-shar-due-to-corona-virus/ap20210427101859457
/.../Further, with the demand for oxygen shooting up from the hospitals to save Covid-19 patients, the Indian space agency's rocket may not be getting oxygen to power itself for some time to come thereby delaying its space missions.The ISRO Propulsion Complex (IPRC) at Mahendragiri in Tamil Nadu is supplying oxygen to hospitals to save Covid-19 patients.The satellite and the rocket (Geosynchronous Satellite Launch Vehicle - F10 (GSLV-F10) are ready at the rocket launch centre in Sriharikota./.../
Launch on Aug 12.https://www.devdiscourse.com/article/technology/1646335-isro-swinging-back-to-full-action-plans-to-launch-geo-imaging-satellite-on-august-12
Didn't get a screenshot, but the graphic they showed looked like the stage was pointing in the wrong direction.
Interestingly the Flight Events screen says "CUS IGN CMDed". Possibly an indication that the command was sent but ignition wasn't confirmed? The other ignition events just say "IGN"
T+14 minutes. Prior events.
Quote from: William Graham on 08/12/2021 12:33 amInterestingly the Flight Events screen says "CUS IGN CMDed". Possibly an indication that the command was sent but ignition wasn't confirmed? The other ignition events just say "IGN"From the GSLV F11 launch, the next flight event was supposed to be CUS IGN CNF, ten seconds later.Quote from: Steven Pietrobon on 12/19/2018 09:55 amT+14 minutes. Prior events.
But overall responsibility would have to rest with ISRO and its chairman. So he should do the honourable thing and resign. JMT, needless to say.
K.Sivan( ISRO chairman) is a good man, and there have been some impressive achievements under his direction, but there have been two major failures, the Vikram Lander, and now the GSLV F 10. The GSLV/GISAT-1 setback is particularly dismaying, because it was originally supposed to launch in March/2020, after being taken to the launch pad. Every angle should be looked at including Covid disruption problems, the supply chain and even sabotage. But overall responsibility would have to rest with ISRO and its chairman. So he should do the honourable thing and resign. JMT, needless to say.
CUS being a liquid stage, could they have done an ignition test earlier?
Quote from: Jajar on 03/21/2021 07:12 amFolks ! Is the launch of GISAT-1 still scheduled for next Sunday 28th March ? If so, when will we know on the exact launch details ? According to Shar home page launch has been postponed to Aprilhttps://www.shar.gov.in/sdscshar/index.jsp
It does feel that there has been a decline in ISRO in the last two years or so. This was a proven and mastered technology, the cryogenic stage, that failed utterly. It didn't even ignite. Someone has to take responsibility for the setback.
The vehicle starts a ~13°/s roll rate (and a slower pitch/yaw) right around ignition and something must have caused that torque. Possibly it was intentional and done by the RCS, but realistically it's more likely that some part of the engine let go during ignition and kicked the vehicle into that slow tumble. <end speculation>I wonder if they have vehicle and engine cameras - I don't think I've ever seen any in the livestream or even on their screens (although they do seem to have lots of screens showing the other mission control centers).
Quote from: Jajar on 03/27/2021 05:51 amThe PMO intervened because pressure came from Washington.What quotable evidence do you have to suggest this?
The United States has blocked the launch of GSAT, a powerful spy satellite for India's border patrol. The U.S. position is that some of the strategic components of the satellite's 6 sensors were adopted from a foreign country and that it is against their interests. According to sources close to the Central Intelligence Agency, the launch was postponed by the PM 's office.
Translated into English, the gist of the Kalakaumudi story, written in Malayalam by V.D. Selvaraj, was that it alleged that the U.S. blocked India’s launch of GISAT-1. America objected that six of GISAT-1’s [imaging] sensors had components sourced from foreign countries and that this was against America’s strategic interests, the story said. Quoting the Centre’s intelligence sources, it alleged that the Prime Minister’s Office (PMO) directly intervened to postpone the launch.
Blocking the launch was also in China’s interest as GISAT-1 would have provided India with real-time images of the Chinese troop movements, the story argued.
To return to the topic of the U.S. applying pressure on ISRO to call off the launch, a source said the U.S. had indeed pressured India to call off the mission. It added that it was on instructions from the PMO that the mission was called off, consequent to the U.S. pressure.
GSLV Mark 2 will be backThe GSLV Mark 2 will soon be back on the launch pad. The IRNSS satellite will be launched on GSLV as part of a naval project. The problem has been identified six months ago and necessary changes have been made. Nisar is also preparing for the NASA-ISRO joint mission. The Aditya L1 mission to study the Sun will also be completed later this year. GSLV Mark 2 should be used for this mission as well.
Mar 25, 2022GSLV-F10/EOS-03 Mission Failure: Failure Analysis Committee submits conclusions & recommendationsThe GSLV-F10/EOS-03 Mission lifted-off normally from Sriharikota on August 12,2021 at 0543 hrs after a smooth countdown of 26 hours. In the flight, the performance of the first stage (GS1), the strap-on stages (L40) and the second stage (GS2) were satisfactory and in accordance with the pre-flight predictions. However, the onboard computer aborted the mission at 307 seconds into the flight leading to mission failure.Initial investigations with the post-flight data conducted immediately after the launch indicated that an anomaly in the Cryogenic Upper Stage led to the mission abort. A National level Failure Analysis Committee (FAC) consisting of experts from academia & ISRO, was constituted to identify the causes of the anomaly and to recommend corrective actions for future missions. The FAC has thoroughly reviewed the flight data along with all data related to the activities ranging from the stage preparation at the launch complex, countdown to lift-off. The Failure Analysis Committee recommended a series of computer simulations & confirmatory ground tests to simulate the conditions very close to the GSLV-F10 flight scenario and validate the findings of the Committee. Subsequently, the respective teams have completed the simulations & ground tests and presented the results, based on which FAC has completed its deliberations and presented its findings and conclusion on March 24, 2022.The time line of flight events and major observations on the Cryogenic Upper Stage in the GSLV-F10 mission along with all previous GSLV missions, were thoroughly discussed and deliberated. FAC observed that a deviation in performance of the Cryogenic Upper Stage (CUS) was observed at 297.3 sec after lift-off due to which the onboard computer aborted the mission at 307 sec. The ground servicing of the Cryogenic Stage was normal and the required lift-off conditions were achieved. However, subsequent to lift-off, the Committee observed that the build-up of pressure in the propellant (Liquid Hydrogen or LH2) tank during the flight was not normal leading to a lower tank pressure at the time of ignition of the engine. This resulted in anomalous operation of the Fuel Booster Turbo Pump (FBTP) mounted inside the LH2 tank which feeds the main turbopump of the engine resulting in insufficient flow of Liquid Hydrogen into the engine thrust chamber. Detailed studies indicate that the most likely reason for the observed reduction in LH2 tank pressure is a leak in the respective Vent and Relief Valve (VRV), which is used for relieving the excess tank pressure during flight. Computer simulations as well as multiple confirmatory ground tests, closely simulating the conditions in the GSLV-F10 flight, validated the analysis by the FAC.The FAC concluded that the lower LH2 tank pressure at the time of CUS engine ignition, caused by the leakage of Vent & Relief Valve (VRV) resulted in the malfunctioning of the Fuel Booster Turbo Pump (FBTP) leading to mission abort command & subsequent failure of the mission. The most probable reason for the leakage of VRV valve is attributed to the damage in the soft seal that could have occurred during the valve operations or due to contamination and valve mounting stresses induced under cryogenic temperature conditions.The committee has submitted comprehensive recommendations to enhance the robustness of the Cryogenic Upper Stage for future GSLV missions, which includes an active LH2 tank pressurization system to be incorporated to ensure sufficient pressure in the LH2 tank at the appropriate time before engine start command, strengthening of Vent & Relief Valve and associated fluid circuits to avoid the possibility of leakage along with the automatic monitoring of additional cryogenic stage parameters for giving lift-off clearance .
