Broad Reach Engineering's Integrated GPS Occultation Receiver (IGOR), now flying on COSMIC, cost less than 500K$ each to build. Conventional spaceborne atmospheric sensors — passive infrared and microwave "radiometers" — typically cost 200-400M$ each, or nearly a thousand times more. Modern digital technology will allow substantial additional reduction of the GPS instrument size and cost.  For CICERO, Broad Reach will produce a new GPS/Galileo version known as Pyxis-RO (not shown).  Pyxis-RO will also provide real-time navigation, attitude determination, onboard computing, spacecraft operations, and data storage, reducing the need for separate spacecraft subsystems. Future generation instruments may one day be reduced to the size shown on the right, with commensurate decrease in cost.