Top Tweets for #SAR_Fact
🌞Happy #SAR_Fact day! DYK that the original patent for #SAR had it known as Simultaneous Doppler Buildup & was filed by the Goodyear Aircraft Company! #TheMoreYouKnow! #EOCHat
🌞Happy #SAR_Fact Monday! ⁉️#DYK that 🇨🇳 L-SAR 4 01 is the world's first high-orbit, geosynchronous #SAR, entering orbit in August 2023? It's orbit is nearly 40,000 km above the earth resulting in lots of revisits & a large imaging swaths! #TheMoreYouKnow #EOChat
🌞Happy #SAR_Fact Day! #DYK the #BelSAR project carried out an airborne campaign for #SAR bistatic #InSAR measurements at L-band & full polarization, over a test site in Belgium 🇧🇪 in 2018! #WeAreBack #EOChat #TheMoreYouKnow https://t.co/Kbc056FpAI
🌞Happy #SAR_FACT throwback Monday! Here's a #SAR_Fact that got little traction! Maybe if we add a GIF? #TheMoreYouKnow #EOChat
🌞Happy #SAR_FACT day⁉️ DYK 'Zero Doppler Time' (aka the closest approach azimuth time) is the time at which a target on the ground has a Doppler shift of zero with respect to the satellite & the target is perpendicular to the flight path. #TheMoreYouKnow #EOChat
🌞#SAR_FACT⁉️ #DS_SAR was launched July 30th by @isro 🇮🇳 & is a Singaporean 🇸🇬 #SAR built by #IAI 🇮🇱 for #maritime security & oil spill 🛢️detection! 6 other satellites also were aboard! #WorkingTogether #TheMoreYouKnow #EOChat #https://everydayastronaut.com/ds-sar-pslv-ca-2/
🌞Happy #SAR_Fact Monday! Here's a handy dandy chart of #SAR frequencies, wavelengths & typical applications! #TheMoreYouKnow #SAR #GoldenAgeofSAR #EOChat
🌞Happy #SAR_Fact Day⁉️ #DYK #SAR noise floor is the signal created from the sum of all the noise sources & unwanted signals. You should be aware if you are trying to detect a target that has a lower signal than the sensors' noise floor! #TheMoreYouKnow #EOChat
🌞Happy #SAR_FACT Monday! Today we are talking alphabet soup! 🍜Here's a great graphic from @NASA which quickly gives the most common #SAR bands & frequencies along with some typical applications! #TheMoreYouKnow #EOChat
🌞Happy #SAR_FACT day⁉️ #DYK you can access airborne #SAR data ➡️https://t.co/WmE23Hnru8
They keep track of missions, available data & latest images released! The last flown was a Ka-band flight & the latest image released was a P-band over California! #TheMoreYouKnow #EOChat
🌞#SAR_FACT Day⁉️#DYK corner reflectors consist of mutually intersected perpendicular plates. Trihedral reflectors have three surfaces that are orthogonal & provide relatively large radar cross sections while dihedral reflectors only have two surfaces. #TheMoreYouKnow #EOChat
🌞Happy #SAR_Fact Day⁉️ DYK unwrapping phase is a process that helps determine the actual absolute change in phase -- wrapped phase values are constrained and a 'reconstruction' of sorts is required to assess the original phase differences. #TheMoreYouKnow #EOChat
🌞#SAR_Fact Day⁉️ DYK In azimuth, the platform induces a frequency modulation resulting in a very long antenna being synthesized by the motion of the platform. 🧐Can you tell us how long your favorite SAR synthesized antenna are? #TheMoreYouKnow #EOChat
🌞#SAR_Fact Monday⁉️ DYK different polarizations of the radar waves are affected differently in their interactions with the surface & the depolarization process is dependent on the geometrical & dielectric properties of the target! #TheMoreYouKnow #EOChat
🌞#SAR_Fact Day⁉️ DYK there is a dual pol version of the Cloude-Pottier H/a/alpha decomp incl. only entropy & alpha? This can provide more detailed information about the scattering of the target & at more continuous spatial scales using SLC #Sentinel1 #TheMoreYouKnow #EOChat
@MaxLenormand 👋@MaxLenormand we've been working for the last ~three years to promote #SAR & specifically fantastic #WomeninSAR -⭐️#SAR_STAR Friday! Every #SAR_FACT Monday we give a #SAR fact & every #TrainingTuesday we list a training resource! ➡️https://t.co/Pstq1DuGun! #GoldenAgeofSAR
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