# Satellite Imagery for Farmers: A Simple Guide
Satellites. They sound expensive, complicated, space-age. But here's the truth: they're one of the most practical tools a modern farmer can use. And you don't need a PhD to understand them.
## What Are Satellites Actually Doing?
Every few days, satellites like SkySat and Sentinel-2 orbit over your farm and take pictures. But these aren't regular photos—they capture light your eyes can't see. Specifically, they measure how much red and near-infrared light your crops reflect.
Why does that matter? Healthy plants reflect a lot of near-infrared light. Stressed plants don't. So the satellite can literally see which parts of your field are thriving and which need attention.
## NDVI: The Magic Number
NDVI stands for Normalized Difference Vegetation Index. Fancy name, simple concept.
It's a score from -1 to +1 that tells you how green and healthy your crops are:
- **0.8 to 1.0**: Excellent, dense, healthy vegetation
- **0.5 to 0.8**: Good, normal growth
- **0.2 to 0.5**: Stressed or sparse vegetation
- **Below 0.2**: Bare soil or dead plants
When we show you a satellite image, we color-code it. Green = good. Yellow = watch this. Red = take action now.
## What Can You Actually See?
Satellites are incredible at spotting:
- **Drought stress** (plants start struggling before you can see it from the ground)
- **Irrigation problems** (uneven watering shows up fast)
- **Disease outbreaks** (infected areas have different reflectance)
- **Nutrient deficiencies** (nitrogen-starved crops look different from space)
- **Growth patterns** (see which management zones are performing)
## The Limitations
Satellites aren't perfect. Clouds block them. They can't tell you exactly what's causing the stress (that's where ground sensors help). And they're better at big-picture patterns than individual plant problems.
But as a monitoring tool? Unbeatable. You get a bird's-eye view of your entire operation, every single day, without setting foot in the field.
## How AgriLink Makes This Simple
Here's the thing: raw satellite data is overwhelming. We take care of the complexity:
1. We pull fresh imagery from the best sources
2. Our AI identifies problems automatically
3. You get plain-English alerts: "North field showing early drought stress"
No training required. No complicated software. Just answers.
**Want to see how satellite data can work for your farm? Pre-register for early access.**