Quote from: Satori on 05/28/2023 06:01 pmQuote from: jcm on 05/28/2023 05:33 pmIs this really IRNSS-1J? I thought 1J to 1L were spares of the I1K-based design, while this is the first I2K-based IRNSS so I would have expected it to be IRNSS-2A or something like that.I haven't seen the designation 'IRNSS-1J' being used by ISRO and is not mentioned on the press-kit.It had the project name "IRNSS-1J" initially but was renamed to NVS-1 a few years back. Launch vehicle i believe was intended to be PSLV originally but was switched to GSLV along with name change. ISRO's annual report from a few years back states that NVS-1 is intended to replace IRNSS-1G which was launched on a PSLV in 2016. I have attached a copy of ISRO's annual report from 2020-2021. Refer to pages 46-47 for more info on NVS-1.
Quote from: jcm on 05/28/2023 05:33 pmIs this really IRNSS-1J? I thought 1J to 1L were spares of the I1K-based design, while this is the first I2K-based IRNSS so I would have expected it to be IRNSS-2A or something like that.I haven't seen the designation 'IRNSS-1J' being used by ISRO and is not mentioned on the press-kit.
Is this really IRNSS-1J? I thought 1J to 1L were spares of the I1K-based design, while this is the first I2K-based IRNSS so I would have expected it to be IRNSS-2A or something like that.
Beginning with NVS-01, the second-generation satellites will fly with Indian-developed atomic clocks in place of the units manufactured by Swiss company SpectraTime which were flown on previous spacecraft.With a mass of 2,232 kilograms, NVS-01 is also over 900 kilograms heavier than the first-generation satellites and incorporates other enhancements to expand the capabilities of the NavIC constellation. These include broadcast of a new L1 signal, in addition to the L5 and S-band signals broadcast by the existing satellites, which will improve interoperability with other satellite navigation systems such as the US Global Positioning System (GPS) network.The new second-generation spacecraft, including NVS-01, are based on ISRO’s I-2K satellite bus instead of the I-1K platform used on the first-generation spacecraft. Powered by a pair of solar arrays generating up to 2.4 kilowatts, the satellites have a design life of at least 12 years.The increased mass of the second-generation satellites renders them too heavy for the Polar Satellite Launch Vehicle (PSLV) rockets that were used to deploy the first generation. Instead, they will be carried aboard the more powerful Geosynchronous Satellite Launch Vehicle, or GSLV, using the Mk.II version of this rocket.
LAUNCH! ISRO's GSLV Mk.II rocket launches with NVS-01.Overview:nasaspaceflight.com/2023/05/india-… - by William Graham (@w_d_graham).Livestream:youtube.com/watch?v=nGRsTQ…
Staging. It's a bit off its trajectory but classed as nominal.
Staging 2-3. Trajectory looks spot on now.
S/C Sep for NVS-01.
I started to be concerned 😟 when I noted the slight deviations on the graphs.