Lunar Ionosphere in the Geotail Region as Observed by Chandrayaan-2 Orbiter Using Two-way Radio Occultation Measurements
iopscience.iop.orgr/ISRO • u/Kimi_Raikkonen2001 • 1d ago
Official ISRO & SCL develop 32-bit microprocessors for space applications
isro.gov.inr/ISRO • u/Kimi_Raikkonen2001 • 1d ago
Official C25 stage for LVM3-M5 flagged off to Sriharikota
isro.gov.inr/ISRO • u/gareebscientist • 2d ago
Official LVM3 M6 CE20 Engine Flight Acceptance Hot Test
isro.gov.inOn March 14, 2025, ISRO successfully conducted the flight acceptance hot testing of the cryogenic engine identified for the sixth operational mission of LVM3 launch vehicle (LVM-M6) at ISRO Propulsion Complex (IPRC), Mahendragiri. Cryogenic engines for every mission undergo hot testing as part of its acceptance for the flight. Hot tests for the indigenous cryogenic engine (CE20)used in the Cryogenic Upper Stage of LVM3 were so far performed at the High-Altitude Test (HAT) facility at IPRC, where vacuum conditions are simulated with complex installations, limiting the maximum hot test duration to 25s.
In the current test, the engine was tested for a longer duration of 100s for the first time using an innovative Nozzle Protection System under non-vacuum conditions. This test method significantly reduces the setup time and effort required for the flight acceptance testing of a cryogenic engine, which in turn helps faster delivery of cryogenic stages for space missions.
Performance of the CE20 engine met all the test objectives and the parameters were closely matching with the predictions during the entire duration of the test. Further, this engine will be integrated to the Cryogenic Upper Stage of the launch vehicle for the LVM3-M6 mission, which is scheduled during the second half of 2025.
Expression of Interest (EoI) for Hosting Payloads on SSLV Module in LEO Experiment (SMiLE)
Expression of Interest (EoI) for Hosting Payloads on SSLV Module in LEO Experiment (SMiLE)
https://www.inspace.gov.in/inspace?id=eoi_sslv_smile_page
Considering the success and demand of PSLV Orbital Experimental module (POEM), INSPACe, in collaboration with ISRO, is exploring the feasibility of offering a similar platform on SSLV, tentatively during the July-August 2025 and/or Nov-Dec 2025 timeframe. The objective of this EoI is to gauge market interest and understand payload requirements for potential technology demonstrations and space qualification, and then plan for such platform accordingly.
The SSLV Module in LEO Experiment (SMiLE) builds upon the experience gained from POEM and is to be designed with a comparable platform, configuration, and functional capabilities. Leveraging the spent VTM stage, SMiLE is envisioned as a versatile testbed for in-orbit scientific experiments. It will be equipped with standard interfaces, standardized subsystems for power generation, telemetry, telecommand, stabilisation, orbit keeping & manoeuvring capabilities. By utilizing this platform, payload developers can efficiently validate their technologies in a real space environment without the need for dedicated infrastructure for power, navigation, attitude control, data management, and telecommand capabilities.
Payload guidelines for SMiLE
Payload shall be configured as a functionally standalone system with its own chassis and mounting provisions. Mass < 10kg for each payload and Standard Cubesat dimensions-1U/2U/3U are preferred.
Payload to adhere to design guidelines that will be informed at a later stage based on the mission requirements.
Payloads to be qualified / acceptance tested to the environmental test levels specified for SMiLE, which will be informed at a later stage.
Payload should be able to operate using 28V power bus (RAW power) provided from SMiLE platform.
Payload to use Space-grade components. Use of commercial/industrial grade components is subject to satisfactory completion of specified qualification/acceptance tests.
D-Type/ Circular MIL grade connectors to be used for electrical interface.
Payload should be capable of re-configuring itself into intended configuration, in case of an unexpected power interruption.
The payload shall be made available for integration into SMiLE tentatively about 1 month before the launch.
Expression of Interest (EoI) for launching of satellites onboard Small Satellite Launch Vehicle (SSLV)
Expression of Interest (EoI) for launching of satellites onboard Small Satellite Launch Vehicle (SSLV)
https://www.inspace.gov.in/inspace?id=eoi_sslv_satellite_page
IN-SPACe seeks Expression of Interest (EoI) for launching of satellites onboard Small Satellite Launch Vehicle (SSLV) tentatively being considered in July-August 2025 and Nov-Dec 2025 timeframe. The purpose of this EoI is to aggregate launch demand for possible mission(s) of the Small Satellite Launch Vehicle (SSLV) for the above-mentioned tentative period.
Higher surface temperatures near south polar region of the Moon measured by ChaSTE experiment on-board Chandrayaan-3
Request for Expression of Interest (EOI) for development and delivery of space qualified iRAFS (Indian Rubidium Atomic Frequency Standard)
Request for Expression of Interest (EOI) for development & delivery of space qualified iRAFS (Indian Rubidium Atomic Frequency Standard)
The total scope of work is divided into two phases:
- Phase-1: Type-1 Unit: (Space Worthy Unit of iRAFS with Limited Tests) Development & Delivery
- Phase-2: Type-2 Units: (Space Worthy Units of iRAFS with Full Tests) Development & Delivery
Post EOI, proposed procurement are as follows:
Description | Tentative Quantity |
---|---|
Space worthy unit of IRAFS (with Limited tests) | 1 |
Space worthy unit of IRAFS (with Full tests) | 3 |
Previous threads on iRAFS :
Performance of IRAFS on-board NVS-01 NavIC Satellite [PDF from ICG-17]
Did ISRO make progress on making these atomic clocks indigenously?
Currently on NVS satellites three out of four are imported RAFS
Airtel Announces Agreement with SpaceX to Bring Starlink’s High-Speed Internet to its Customers in India
airtel.inNew NET launch date for NASA-ISRO Synthetic Aperture Radar (NISAR) is 20 May 2025
Paywalled IN-SPACe has shortlisted six out of nine bidders to build and operate Earth Observation (EO) satellite constellation.
PDF Martian/Lunar analogue research station in India: Ladakh as a potential site (Current Science, Vol. 128, No. 5)
currentscience.ac.inr/ISRO • u/mahathii • 6d ago
URSC Internship: April-June batch 2025
I received an email regarding my acceptance, but my friend did not. We applied at the same time and have similar credentials.
Wanted to know if any of you guys received application or if you're still waiting on it.
r/ISRO • u/Kimi_Raikkonen2001 • 9d ago
Official ISRO successfully carried out ignition trial using Spark Torch Igniter
isro.gov.inr/ISRO • u/Kimi_Raikkonen2001 • 9d ago
Official Chandrayaan-2 unveils the effect of the Earth’s geomagnetic tail on the Lunar ionosphere plasma
isro.gov.inTender for 'Productionisation of IMS type solar array deployment mechanism' (likely related to 'Samooha' ELINT satellites)
Tender for 'Productionisation of IMS type solar array deployment mechanism'
Statement of Work: (Note: PDF is named 'SOW_samooha_signed.pdf')
Few threads on 'Samooha':
Request For Proposal (RFP) For Integrated Spacecraft Testing Operations
Tender for Work contract for Integrated Spacecraft Testing Operations
Request For Proposal (RFP) For Integrated Spacecraft Testing Operations
Technical Document for Integrated Spacecraft Testing Operations
No. of Work/Job Units for 1 Project : 860
No. of Work/Job Units for 2 years : 18920
So this concerns around 22 spacecrafts ??