Why do I see unknown SSIDs on the sandbox(es)?
Although the radios on the sandboxes are connected by wires some leakage still exists. The proximity of the sandboxes (for instance sb1 and sb2 are next to each other) causes CSMA to kick in. Some experimenters even reported observing traffic from the sandboxes on the main grid. Interference from the main grid on the sandboxes is also possible. Since we share the building there is also interference in 2.4-2.5GHz spectrum from the access points that do not belong to ORBIT. For that reason we did not bother to turn off Winlab access point WINMAIN, which is on channel 6. We encourage users to utilize 5GHz band for grid experiments.
