A place for fellow rocket scientists and space cadets to discuss aerospace topics
Pages / Topics
Monday, November 16, 2015
Friday, October 16, 2015
NewSpace NYC Business Plan Competitio
in partnership with the Space Frontier Foundation, Digital Vikings, Space Angels Network, OrbitalATK, Heinlein Prize Trust and the Space Finance Group.
http://newspace.nyc/bpc/
http://newspace.nyc/bpc/
Saturday, October 3, 2015
Check out Mark Jackson's hackathon
https://generalassemb.ly/education/physicshack-crowdfunding-hackathon/new-york-city/17518
Thursday, September 24, 2015
UrtheCast goes SAR
http://spacenews.com/wade-larson-on-urthecasts-pivot-from-station-to-constellation/
Sunday, September 13, 2015
Saturday, September 12, 2015
Thursday, September 10, 2015
More thoughts on the complementary nature of SAR imagery to e/o imagery
I earlier mused how I thought there should be some kind of "orthogonality" argument, in a mathematical sense, about why SAR imagery complements electro-optical (e/o) imagery - i.e., why SAR imagery is a unique complement vice being just linearly additive.
E/o imagery is based on collection of light - either reflected or transmitted in the form of heat. SAR imagery is based on the collection of radio frequency (RF) signals - basically time of flight (time to receive return signal) and phase characteristics of the returned signal. Light is characterized as photons, RF energy as waves. While both electromagnetic phenomena come from the same underlying basis of physics, it seems those 2 descriptions should make for some kind of uniqueness, or orthogonality.
E/o imagery is based on collection of light - either reflected or transmitted in the form of heat. SAR imagery is based on the collection of radio frequency (RF) signals - basically time of flight (time to receive return signal) and phase characteristics of the returned signal. Light is characterized as photons, RF energy as waves. While both electromagnetic phenomena come from the same underlying basis of physics, it seems those 2 descriptions should make for some kind of uniqueness, or orthogonality.
Thursday, August 20, 2015
Wednesday, August 19, 2015
Sunday, August 16, 2015
Subscribe to:
Posts (Atom)