#gaofen — Public Fediverse posts

Glacial Lake Mapping Using Remote Sensing Geo-Foundation Model
--
https://doi.org/10.1016/j.jag.2025.104371 <-- shared paper
--
HIGHLIGHTS:
• Proposed U-ViT model based on Prithvi GFM for multi-sensor glacial lake mapping.
• Achieved an F1 score of 0.894 on Sentinel-1&2, surpassing CNNs scoring below 0.8.
• Maintains strong performance with 50% less training data, proving efficiency.
• Excels in detecting small lakes (<0.01km²) and handling clouds and complex terrains..."
#GIS #spatial #mapping #glaciallake #GeospatialFoundationModel #satellite #Sentinel #GaoFen #remotesensing #earthobservation #model #modeling #climatechange #glacial #glacier #melt #melting #UViT #deepleanring #AI #framework #performance #metrics #opensource

Glacial Lake Mapping Using Remote Sensing Geo-Foundation Model
--
https://doi.org/10.1016/j.jag.2025.104371 <-- shared paper
--
HIGHLIGHTS:
• Proposed U-ViT model based on Prithvi GFM for multi-sensor glacial lake mapping.
• Achieved an F1 score of 0.894 on Sentinel-1&2, surpassing CNNs scoring below 0.8.
• Maintains strong performance with 50% less training data, proving efficiency.
• Excels in detecting small lakes (<0.01km²) and handling clouds and complex terrains..."
#GIS #spatial #mapping #glaciallake #GeospatialFoundationModel #satellite #Sentinel #GaoFen #remotesensing #earthobservation #model #modeling #climatechange #glacial #glacier #melt #melting #UViT #deepleanring #AI #framework #performance #metrics #opensource

If you open @tinygs web console, you will find the radiating map as below. from the heatmap we can find out the radiation pattern of the antenna we are using and the distribution of the satellite that the lora board receives.

after i double checked, i realized that there is an altitude difference between 137mhz and 433 mhz satellites. 433 satellites like #gaofen 21,22,23,24 operate at 800km. norby at 550km. while 137 satellites like #starlink and #spacebee are at 300-500km.

#tinygs

#Xinhua:
"China's hyperspectral remote-sensing satellite put into use"
"..Gaofen-5 01A, was launched into space on Dec. 9, 2022. It can provide high-quality hyperspectral data for diverse fields.."
"..runs in the sun's synchronous regression orbit, 705 kilometers above Earth."

https://english.news.cn/20240123/51e5090b542a4a9eb3beb3559fd19a7a/c.html

23.1.2024

#China #CNSA #Erdbeobachtung #Gaofen #Gaofen5 #SAST #Satelliten #Raumfahrt

#Xinhua:
"China's hyperspectral remote-sensing satellite put into use"
"..Gaofen-5 01A, was launched into space on Dec. 9, 2022. It can provide high-quality hyperspectral data for diverse fields.."
"..runs in the sun's synchronous regression orbit, 705 kilometers above Earth."

https://english.news.cn/20240123/51e5090b542a4a9eb3beb3559fd19a7a/c.html

23.1.2024

#China #CNSA #Erdbeobachtung #Gaofen #Gaofen5 #SAST #Satelliten #Raumfahrt

China to launch new station modules and collaborate with Europe on science missions in 2023 https://www.nasaspaceflight.com/2022/12/china-2023/ #international #changzheng3b #changzheng4b #featured #tiangong #chinese #taiyuan #xichang #gaofen #shiyan #china #cz-3b #cz-4b

China shows off its newest satellite’s high-resolution 3D imagery - China launched the Gaofen-7 imaging satellite in November, and the country has just shared the first... more: http://feedproxy.google.com/~r/Techcrunch/~3/PsNemLh5_7k/ #satelliteimagery #satellites #aerospace #gaofen-7 #space #china #asia