Blackadder IA, while there are similarities between SYERS and DB110 they are not the same. The SYERS had a better sensor and optical capability/quality - described
here.
Rapid Deployment Electro-Optical System (RADEOS) was what the UK/RAF called the SYERS programme on Canberra and came complete with the US workstations and cabins, maintained by US contractors.
Raptor couldn't do the Canberra job for 2 reasons:
1. The datalink is utter crud
2. If a GR4 altimeter ever hits 47,000ft . . . . .
Agreed about the datalink, and yes it is the same 'type' as Astor/Sentinel . . . . .
You don't hear too many people saying ASTOR's DL isn't up to much?
You also don't hear many people admiring the high quality imagery being generated by Sentinel either . . . .
As I mentioned previously an option to fit the SYERS sensor and an RMK-TOP with an EO back to 2 modified Bombardier Global Express aircraft was put forward (2004 IIRC) and was turned down as we could cope with the 'capability gap' (chasm!) for the foreseeable future.