The ER-70 Guardian Angel is modified N-4300 Archangel [link]
series commercial airframe that carries specialized radar, communications, operations and control subsystems.
The modifications were done by Sentry Aerospace Industries and Lambda Integrated Defense Systems, the same cooperation company in building the supersonic VVIP / Presidential aircraft, the VC-711 Cruiser One [link]
. Which mean the ER-70 Guardian Angel has same engine performance and configurations.
The ER-70 is an airborne warning and control system (AWACS), but without the bulk rotary radome on it's fuselage, because it could sacrifice its supersonic speed and high maneuver capability. Instead, The ER-70 used sets of canoe-shaped radome spread all over the fuselage.
Same as VC-711 Cruiser One, ER-70 Guardian Angel equipped with flight-refueling capability.
Crew: 2 (pilot and co -pilot)
Capacity: 13-19 mission crew
Power-plant: 4× Lambda LTF 3000V-3D afterburning with three dimensional thrust-vectored turbofans
Maximum speed: Classified
Cruise speed: Mach 2.02
Service ceiling: Classified
Other electronic features are:
Electronic Support Measures (ESM) for passive detection, an electronic surveillance capability to detect and identify air and surface-based emitters.
Joint Tactical Information Distribution System (JTIDS) to provide secure, anti-jam communication for information distribution, position location and identification capabilities.
Advance Global Positioning System (GPS).
Joint Surveillance Target Attack Radar System (Joint STARS) that tracks ground vehicles and some aircraft, collects imagery, and relays tactical pictures to ground and air theater commanders.
Many more of features were deeply classified.
Some says its radar and sensors can detect anything that move, even it is a stealth vehicle.
A perfect "Guardian Angel" for the Cruiser One.