"Kopyo on MiG"
CAG
Kopyo range:Audit noticed (November 2009)
that since its induction, the performance of
the radar had not been satisfactory
due to various inadequacies in the Air-to-Ground Range (AGR) mode.
One of the reasons for the poor performance was selection of unproven radar
for induction by IAF, for which
the software was still under
development/modification (July 2009).
IAF stated (November 2010) that
OEM specialists were sent (November 2010) to the Air Force Station, ‘S-17’
to load a new software to resolve the inaccuracies in AGR mode. However,
there was no improvement in the AGR mode further.
57km against 5 Sq Mtr air to air.
https://www.flightglobal.com/news/artic ... ile-56106/
In IAF service
In short integration with Kopyo was done late for R77, which anyways had reliability issues & even Kopyo had reliability issues.The Ministry’s contention was in conflict with its reply on sub optimal
performance of ‘BB’ radar sub-assemblies and non-integration check of
‘EE’ Missile till July 2009 which affected BVR capability of the aircraft
during this period and expiry of life of ‘EE’ Missile in
December 2010 as discussed in para 2.3.2.4
(a). Ministry’s response to Audit query (May 2015) regarding extension of life of
‘EE’ Missile and effect on BVR capability of ‘D’ aircraft, was awaited
(September 2015).
http://english.mathrubhumi.com/news/ind ... s-1.889515
Tejas radar range was 45-50km without Cobham radar. Indian standard radar calibration is 2 Sq Mtr. This translates to a range of 60 km for a 5 Sq Mtr target. So very much equivalent to Kopyo.
Also - MiG-21 Bison availability:
Hard to see how the Tejas would not better the above over time.Against the prescribed norms of 75 per cent the average serviceability
rate of aircraft ranged between 41.32 per cent and 51.52 per cent during 2004-
05 to 2008-09
About MiG-21 Bison flight performance vs Tejas LCA
Tejas is at 24 Alpha today.Air Commodore (Retd) Harish Nayani is a former LCA test pilot who has flown the MiG-21 Bison aircraft extensively and commanded a Bison squadron.
"There is absolutely no doubt that the Mk 1, even if limited to 20 alpha would be many magnitudes better than the venerable Bison on all fronts. Notably, handling, safety, pilot comfort, and performance in the subsonic and trans-sonic regimes."
About avionics, there is literally no comparison.