Jan 28, 2026 · NASA's terrain elevation data measure current height and changes in land altitude and are useful for creating digital elevation models.

The Shuttle Radar Topography Mission (SRTM) payload flew aboard the Space Shuttle Endeavour during the STS-99 mission. SRTM collected topographic data over nearly 80% of Earth's land …

Jan 5, 2025 · The International Space Station (ISS) orbits Earth at an average altitude of approximately 420 kilometers (260 miles) above the Earth's surface. This altitude allows the ISS to remain in a …

Jan 29, 2026 · NASA's data for digital elevation models (DEM) comes from airborne and space-based sources and are useful for analyzing a majority of Earth's terrain.

Jan 28, 2026 · Air mass/density is a fundamental property of atmosphere. Mixture of gases forming Earth's atmosphere, consisting of nitrogen (∼78%), oxygen (∼21%), water vapor, and other trace …

NASA’s OpenAltimetry is a free and powerful map-based data visualization and discovery tool for exploring surface elevation profiles from the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) and …

Feb 10, 2025 · The curvature of the Earth can be observed at an altitude of around 35,000 feet or higher, such as when flying in a commercial airplane.

GNSS is a space geodesy technique that provides autonomous geospatial positioning with global coverage. NASA hosts one of six global GNSS data archive centers.

Jun 1, 2024 · Water usually boils at 212F or 100C at sea level. As you go higher up in the atmosphere (higher altitude), the amount of atmosphere pushing down on you decreases, hence the pressure …

Space-based platforms can be placed in several types of orbits around Earth. The three common classes of orbits are low-Earth orbit (approximately 160 to 2,000 km above Earth), medium-Earth …