Landsat
11 articlesThe Landsat Program: A Complete Guide to 50+ Years of Earth Observation
Landsat is the longest continuous record of Earth's surface from space, running since 1972. Learn how Landsat 8 and 9 work, what their OLI and TIRS sensors measure, how the 30m archive enables long-term change detection, and how Landsat compares to Sentinel-2.
2026-06-18 · 5 min read
Harmonized Landsat Sentinel (HLS): One Consistent Time Series from Two Sensors
HLS merges Landsat 8/9 and Sentinel-2 into a single, atmospherically corrected 30m dataset with 2-3 day revisit. Learn how harmonization works, what HLSL30 and HLSS30 contain, and when a fused time series beats a single sensor.
2026-06-17 · 5 min read
Land Surface Temperature: Measuring Earth's Heat from Space
How thermal infrared satellites measure land surface temperature, the difference between LST and air temperature, and applications from urban heat island studies to volcanic monitoring and wildfire detection.
2026-01-24 · 7 min read
Coastal Erosion Monitoring from Satellites: Tracking Shoreline Change
How satellite imagery tracks coastal erosion, shoreline retreat, and sediment transport over time. Covers waterline extraction methods, sub-pixel accuracy techniques, and long-term change analysis with Landsat and Sentinel-2.
2026-01-19 · 8 min read
Pansharpening: How to Get High-Resolution Multispectral Imagery
Pansharpening combines a high-resolution panchromatic band with lower-resolution multispectral bands to produce sharp, colorful satellite imagery. Covers Brovey, IHS, PCA, and Gram-Schmidt methods.
2026-01-13 · 8 min read
Sentinel-2 vs. Landsat 9: A Practical Comparison for Earth Observation
A detailed comparison of Sentinel-2 and Landsat 9 — spectral bands, resolution, revisit, data access, and which sensor suits which application. Covers harmonization approaches for combined use.
2025-12-27 · 6 min read
Mapping Burn Severity After Wildfires: NBR and Satellite-Based Assessment
How satellite data maps wildfire burn severity using the Normalized Burn Ratio (NBR), differenced NBR (dNBR), and other spectral approaches. Covers severity classification, timing considerations, and applications in post-fire management.
2025-10-21 · 9 min read
Tracking Urban Sprawl with Satellite Time Series: How Cities Grow from Space
How multi-decadal satellite records document urban expansion patterns, the methods for mapping impervious surface growth, and what sprawl metrics reveal about sustainable development.
2025-09-18 · 7 min read
Urban Heat Islands from Space: Mapping City Temperatures with Thermal Satellites
How satellite thermal infrared data reveals urban heat island patterns, the physics of land surface temperature retrieval, and practical applications for urban planning and public health.
2025-09-16 · 9 min read
Land Cover Change Detection: Methods for Tracking How Earth's Surface Evolves
A practical guide to satellite-based land cover change detection methods — post-classification comparison, image differencing, time series analysis, and object-based approaches. When to use each and expected accuracy.
2025-08-23 · 7 min read
Tracking Glacier Retreat from Space: Four Decades of Satellite Evidence
How satellite imagery documents glacier retreat worldwide using multispectral classification, SAR velocity mapping, and elevation change detection. Covers methods, key datasets, and what glacier loss means for water resources.
2025-08-09 · 8 min read