Satellite Archives - GIS Geography

MODIS: Moderate Resolution Imaging Spectroradiometer [Satellite]

Despite popular belief MODIS is a satellite, it’s actually an instrument on-board a satellite. It has 36 bands, 250-1000 meter resolution and 2-day revisits.

25 Satellite Maps To See Earth in New Ways [2020]

These are the top 25 satellite maps in 2020. The best part? You’ll get to explore Earth in new ways that you’ve never thought possible. Let’s get started.

Satellites in Space: Types and Uses of Satellites

A list of the 50 most iconic satellites put up into space to monitor our planet. We show the uses and types of satellites like weather and GPS satellites.

IKONOS Satellite Imagery: First Commercial Space-based Imaging

IKONOS provides panchromatic, natural-color, color-infrared and stereo images for cartographic, remote sensing and photogrammetric applications.

SRTM Shuttle Radar Topography Mission

During an 11-day mission, Space Shuttle Radar Topography (SRTM) mission captured Earth’s elevation at 1 arc-second (30 meters) for over 80% of the Earth.

Polar Orbit vs Sun Synchronous Orbit

A polar orbit satellite travels pole-to-pole. For a sun-synchronous orbit, it passes over any given point on Earth’s surface at the same local solar time.

Why the Atmospheric Window Matters in Earth Science

The atmospheric window allows specific bands of electromagnetic (EM) radiation to reach the Earth. On the other hand, absorption bands prevent EM radiation.

Geosynchronous vs Geostationary Orbits

While geosynchronous satellites can have any inclination, the key difference is that satellites in geostationary orbit lie on the same plane as the equator.

Trilateration vs Triangulation – How GPS Receivers Work

Have you ever wondered how your GPS receiver works? They use a technique called trilateration, which measures distances, not angles as in triangulation.

The Geoid – Hypothetical Mean Sea Level

The geoid measures mean sea level and gravity. The GRACE and GOCE satellites are providing the most accurate measurements of the geoid to this date.