This is something I have always wondered about. What are the costs associated with updating the radar system that could, in turn, allow taller buildings downtown? (outside the flight paths of course) If it's not SUPER expensive, wouldn't it behoove some developer to include that as part of, say, a 1000' proposal near North Station? Perhaps a couple developers could split the costs. I don't know, I am clearly not an expert on radar. Is this even possible? It just seems like, if this is a way that we could lift some of the height limits downtown, it's an avenue that should be explored.
Well -- here's a bit of "Radar Science" for you to chew-on
Radar to be free and clear needs to be high above all the "terrain obstructions" otherwise you get what is called "Ground Clutter"
Now Logan sitting on a flat slab of fill just above Sea Level would seem to be an ideal location for a radar -- except that there are buildings [relatively low on the East Boston, Revere and Winthrop Side and more significant in the Southie Seaport and of course Downtown Boston
Choice number one -- try to keep the buildings low
Choice number two --raise the radar
Here a scenario which I suggested a number of years ago -- build a really tall tower [1500 ft] unaligned with the ends of any runway -- and stick a radar on top of it*1 -- mission accomplished -- a win win
radar sees everything and then some -- you get a really tall -- world scale tower to tell everyone -- here is Boston -- a kind of 21st C Pharos of Alexandria
By the way that same series of suggestions included the architectural use of balloons -- if you want a spike -- make a balloon -- equipped with a radar which can trigger emergency deflation of the balloon in case of an aircraft needing the low altitude space for a very rare one-engine go round and land emergency
*1 Note if someone says -- well it wont be in the same place and the scan will not be centered on the airport -- that dog will not hunt -- Project Charles*2,3 which was the forerunner of Project Lincoln which in turn begat Lincoln Laboratory to build the North American Air Defense System known as
Semi
Automated
Ground
Environment
*2 Test of a "Synthetic Plan Position Indicator [the traditional line sweeping around the circular display] apparently centered on Cambridge but actually using a radar located in Truro on the Cape connected via phone lines to the Whirlwind Computer [nearly taking up the entire Barto Building on Mass Ave in Cambridge next to Novartis] -- and done almost
70 years ago!!
*3
K.C. Redmond & T.M. Smith (2000-10-10). From Whirlwind to MITRE: The R&D Story of the SAGE Air Defense Computer. published by Massachusetts Institute of Technology 2009, ISBN 0262264269. ISBN 9780262264266. Retrieved 2015-08-09.
Strategic Computing: DARPA and the Quest for Machine Intelligence, 1983-1993
by Alex Roland, Philip Shiman, William Aspray