satellite data
5 articlesA Field Guide to Free Satellite Data Sources: Sentinel-1, Sentinel-2, VIIRS, and NASA FIRMS
Four open satellite data sources cover most monitoring needs — but each one sees the world differently. This guide explains what Sentinel-1 SAR, Sentinel-2 optical, VIIRS nighttime lights, and NASA FIRMS active fire each measure, and how to pick the right one.
2026-06-19 · 5 min read
How to Choose the Right Satellite Data for Your Project
With dozens of satellite data sources available, picking the right one for your specific analysis can be overwhelming. This decision guide walks through the key questions to ask before you start.
2026-01-26 · 6 min read
Free vs Commercial Satellite Imagery: Resolution & Cost
Sentinel and Landsat versus commercial optical and SAR imagery: resolution, revisit and cost compared, and when paying for imagery is worth it.
2025-12-22 · 8 min read
STAC Explained: The Standard That Makes Satellite Data Discoverable
What the SpatioTemporal Asset Catalog (STAC) specification is, how it works, and why it has become the standard for organizing and searching satellite imagery. Covers Items, Collections, Catalogs, and the STAC API.
2025-11-23 · 8 min read
4 Types of Resolution in Remote Sensing, Explained
Spatial, spectral, temporal and radiometric resolution in remote sensing: what each means, typical values for common satellites, and the trade-offs.
2025-11-18 · 8 min read