All the useful space science, Weinberg points out, has been done using unmanned satellites.
Gathering military intelligence using unmanned aircraft can be prohibitively so.
Tracking the potato late blight pathogen in the atmosphere using unmanned aerial vehicles and Lagrangian modeling.
"China using unmanned aircraft would have met with problems," he said.
MILITARY drones already fly frequent missions and civilian operations using unmanned aircraft are coming.
An Iraq combat veteran who helped design much of the military's doctrine for using unmanned drones also has qualms.
Consequently, says How, there has been a lot of interest in using unmanned aerial vehicles, or UAVs, instead.
Colombia is currently testing a programme to aerially fumigate coca crops with the controversial herbicide glyphosate using unmanned drones.
SPYING is a sophisticated and expensive business and gathering military intelligence using unmanned aircraft can be prohibitively so.
Mr. Levin also advocated increasing attacks against the organization by Pakistan and by the United States, using unmanned drone strikes.
Cao C, X Lee, J Muhlhausen, L Bonneau, J Xu (2018) Measuring landscape albedo using unmanned aerial vehicles.
