These satellite most likely use a large, unfurlable dish antenna to collect the signals.
A official reported, that, although the satellite shares the same name with its precedessors, it is nearly 90% different in terms of technology.
Trumpet 6 is the host for the SBIRS-HEO-3 early warning sensor.
Trumpet 6 (or NROL 35) is the host for the SBIRS-HEO-3 early warning package.
Trumpet 7 (or NROL 42) likely carries the SBIRS-HEO-4 early warning package.
Note: The NROL designations refer to the launch, not to the payload.
|Type / Application:||SIGINT, early warning|
|Orbit:||2101 km × 37748 km, 62.8° (#1)|
|Trumpet 6 (USA 259, NROL-35, SBIRS HEO-3)||2014-081A||13.12.2014||Va SLC-3E||Atlas-5(541)|
|Trumpet 7 (USA 278, NROL 42, SBIRS HEO-4)||2017-056A||24.09.2017||Va SLC-3E||Atlas-5(541)|
Further high orbit SIGINT missions:
Geostationary orbit COMINT (Canyon-Chalet-Vortex-Mercury series)