Onboard Radar in Passenger Jets?

Avionics - Wikipedia, the free encyclopedia

en.wikipedia.org/wiki/Avionics

Military aircraft had become flying sensor platforms, and making large amounts of ... On-board communications are provided by public address systems and aircraft intercoms. .... The military uses radar in fast jets to help pilots fly at low levels. end quote from Google regarding Wikipedia and Avionics.


I have been researching lately CME's (Coronal Mass Ejections) from the sun and their effects on GPS satellites and co-ordinates worldwide. One of the things I found out is that often a GPS Satellite turns upside down during a magnetic storm when it thinks the poles have shifted during the storm. When it is in the wrong direction likely it cannot accurately send GPS information as a result of this. All GPS satellite positioning need three satellites to triangulate a position anywhere on earth within 3 feet in accuracy for hikers (with GPS devices), all cell phones on earth, planes, ships and some cars and trucks.


During last weeks Magnetic storm caused by a level 3 CME from the sun it was said that instead of 3 feet of accuracy GPS anywhere worldwide could have been  reduced to within 30 feet accuracy instead of 3 feet. And I was thinking that during some IFR landings of passenger jets 30 feet just wouldn't be good enough. It also might not be good enough to dock a large ship in the fog in a port. So, I was thinking that passenger airliners might need their own radar on board that could tell them not only if they were near another aircraft but also how near the ground is when landing. Because scientists say we might be having up to one largish CME per month until the end of 2013. This potentially could save a lot of lives if passenger planes all had their own on-board radar for emergencies like when GPS fails for one reason or another or when pitot tubes freeze over and give incorrect airspeed indications. This becomes even more important when on autopilot when computers are flying the plane because computers might not be able to distinguish unusual changes or to know what to do with strange readings that may or may not be accurate thereby precipitating a real emergency. 

Later: After doing more research I found that though passenger jet planes have radar usually on board, they are severely limited under which conditions they can navigate while using it. So, it might be important to make sure that when a magnetic storm is going on that they have more leeway to figure out whether they are 3 feet from the runway or 30 feet from the runway. In landing this is a very big difference.