If you’ve got a hankering to find out what the super-secret Lacrosse radar satellites look like, the Russians got you covered. A Russian satellite tracking facility in Siberia used telescopes to take photos of several of these satellites, and then, rather unconventionally, released the images. The images were collected and analyzed, and posted in a PDF album:
An Album of Images of LACROSSE Radar Reconnaissance Satellites
Made by a 60 cm Adaptive Optics System
at the
G.S. Titov Altai Optical-Laser Center
The images are not spectacular… nobody will be making details models based off them. But you can get a sense of the overall configurations(s), as well as the size of the antennae; from that, an analyst could give you a good idea what the capabilities of the sensor systems are.
Much more aerospace stuff is available via the APR Patreon.