1. TERCOM is not some ultimate technological end for navigation.. Every countries has its own technologies and ways for navigation. Our hybrid inertial navigation system using a ring-laser gyro (RINS) coupled with a GPS receiver and a digital radar altimeter (all developed by the DRDO’s Research centre Imarat, or RCI, and integrated jointly by the Advanced Systems Laboratory, or ASL, and the Aeronautical Development Establishment, or ADE) is indigenous and highly effective.. Our terminal guidance Scene Correlation and Navigation (SCAN) using SAR/ISAR mapping is similar type correlation technology (even better in some aspects) like DSMAC.. Why we need to change it with DSMAC???.. SCAN is more reliable .. Because here high resolution satellite SAR images are compared by onboard x band SAR images.. These navigation techs are well proved in Brahmos.. INS correction using SAR image also will be their in Nirbhay which is better than TAINS( TERCOM using with INS)..
1.5 One disadvantage of TERCOM systems is that the entire route has to be pre-planned, including its launch point. If the missile is launched from an unexpected location or flies too far off-course, it will never fly over the features included in the maps, and become lost.This makes TERCOM based systems much less flexible than more modern systems like GPS, which can be set to attack any location from any location, and does not require any sort of pre-recorded information which means they can be targeted immediately prior to launch.
2. Why BABUR using TERCOM & DSMAC?? How you getting the pre-recorded contour map of the terrain for TERCOM (by satellite????? Which satellite???) and How you take photographs of target for DSMAC (using Surveillance aircraft???)... Each must develop their technology according to their available resources( satellites) and needs.. Here it is evident that Pakistan just copy paste old Tomohawk nav system blindly...
One more thing is the first two tests of Nirbhay are meant for validating the robustness of the missile’s airframe and that of its two-stage propulsion system (and hence are not equipped with digital terrain profile matching sensor and warheads. The next two, also to be conducted from ITR, will seek to validate the Nirbhay’s flight management system, inclusive of the digital terrain profile matching sensor (an X-band SAR)...
1. It's theoretical at this stage. We will gauge the success of all these systems once it is implemented in nirbhay and performed as you are advertising it should.
1.5 No You can not fly Cruise missile without tercom based solely on INS coupled with GPS receiver. Since Indian GPS are not Jamming prone, Indian scientists would not take the risk of going all out GPS on nirbhay without same backup if GPS signals fail. TERCOM is there for this very basic reason.
And your assumptions are pretty much wrong, every modern cruise missile has TERCOM/
TERPROM in it. Every cruise missile flight is pre-planned. The surprise factor is Missile Low-Low-Hi trajectory which masks missile location until it's late too intercept. No Country ever launch it's cruise missile solely based on GPS. this is the most foolish mistake consider to be done ever.
It's
only during the flight that you can change Missile paths. Read Block IV tomahawk links that I posted couple pages back how GPS works in it
And for Terminal guidance, one can use DSMAC which is an autonomous missile guidance
concept based on area correlation of sensed ground scenes . It's a concept not a technology, so You can implement this concept as per your requirements, one way you have described is in your post. So How your SCAN becomes better DSMAC when it is actually a way to implement DSMAC? Do you know there is a camera installed in Cruise missile which take photos in terminal phase and compare it with the target to match and set it's terminal dive ?
If you are not using DSMAC, then you your terminal guidance is provided by IIR seeker like of storm shadow or SOM cruise of turkey
2. Since your Ignorance about Tercom and DSMAC is exposed openly, You don't even know how cruise missile works and just shooting tangents left, right, up down on mere assumptions instead of the proven history of every cruise missile launch from first gulf war to second gulf war to Libyan conflict which proved every cruise missile follow a preplanned route
So i'm not even going to comment your ignorant remark of Babur Tercom and DSMAC and the number of cameras installed in it and no we didn't copy pasted TERCOM or DSMAC, we developed both the system in house.It's not the software that you can copy, it's the algorithms ( image processing, the flight control software etc etc), hardware software combined on a FPGA board which you can not copy paste. You should have a basic electrical engineering knowledge to know such systems has to be developed from scratch and nobody can copy paste it. It's all in Babur database thread which you read obviously in strategic missile subforum
And about the maps part, Pakistan is using Beidou which has mapping capability. Our SPD has signed agreements for military usage of Beidou which can map terrain in Centimeters or Milimeters besides there are commercial firms through which we can obtain terrain mapping up to in Centimeters. Again info is in babur database thread
I hope when you quote this post, you have done some reading about everything and arguments would not be based on blind patriotism and ignorance
With only using an altimeter how can a missile become terrain hugging???? Their should be a correlator comparing terrain contour with Altitude measured.. May be any other tech other than TERCOM.. Anyway Brahmos is terrain hugging according to Dr.Sivathanu Pillai...
Ermm because that's the job of Radar altimeter ? It send data to flight computer and prevents an object from crashing in to ground. How do you think AshM achieves 5-10 Meter from 100-200 Meter altitude in terminal phase before attacking the ship ?
Shaheenmissile post in previous pages has amply explained the difference b/w Tercom and just radar altimeter
And by the homing image analysis part, it means the data collected by active seeker can form a better image thorugh high data processing and Better homing image analysis