Off-Nadir Delta
Where to look today · why it matters · which sensor to task
Off-Nadir Delta tells you where to look today, why it matters, and which satellite sensor to task — then lets you look closer. From the day's world events to imagery intelligence, in one platform.
Where to look · why it matters · which sensor
Know where to look today — and how to see it
Most tools give you raw alerts or raw pixels — not the decision in between. Off-Nadir Delta connects them: it surfaces where to look today, reasons over why it matters, recommends which satellite sensor to task, and lets you look closer — world events, an AI intelligence analyst, and a satellite-imagery workbench in one place.
Watchfloor
Where to look today
Your daily global situational picture
Live geolocated geopolitical and security events, what changed since you last looked, a scrubable timeline, and your saved areas — all on one screen. The fastest way to know where to look today.
Open the WatchfloorDelta Agent
Why it matters · which sensor to task
An AI analyst that tells you why — and what to image
Ask a question in plain language. Delta Agent reasons over live events with real intelligence tradecraft and returns a sourced, geolocated brief — explaining why it matters and recommending which sensor (SAR or optical) and area to image next, then reading the imagery for you.
Ask Delta AgentMap
Look closer
Look closer — no GIS software needed
Stack Sentinel-1 SAR, Sentinel-2 optical, VIIRS nighttime lights and more, then run change detection, vessel detection, and time-series monitoring directly on the map. No code, no API keys.
Explore the MapDelta Signals — continuously refreshed, AI-enriched geopolitical and security events distilled from news worldwide — feed both the Watchfloor and the Agent. Every finding opens on the Map for a closer look, so you move from news to tasking without switching tools.
Pricing
Start free — no credit card required. Usage is metered in tokens, so you pay only for the imagery and analysis you actually run.
See plans & pricingLearn & Analyze
Step-by-step guides to help you get the most from satellite data
Satellite Area Monitoring
MonitoringDraw any area and track how it changes over time — no GIS, no code
Read guideNDVI Vegetation Analysis
AgricultureCalculate vegetation health indices using Sentinel-2 imagery
Read guideChange Detection
AnalysisCompare satellite images before and after any event
Read guideSAR Flood Mapping
DisasterLearn to detect and map floods using radar imagery
Read guideSAR Ship Detection
MaritimeIdentify vessels in SAR imagery for maritime monitoring
Read guideActive Fire Mapping
WildfireTrack real-time wildfire hotspots with NASA FIRMS thermal data
Read guideFrom the Blog
In-depth articles on satellite imagery, indices, and remote sensing techniques
Getting Started with Sentinel-1 SAR Imagery: A Beginner's Guide
Learn how to access and analyze Sentinel-1 SAR radar data in your browser. This step-by-step guide covers the basics of SAR imagery, how to search for data, and interpret your first radar image.
Mapping Floods with SAR: A Practical Workflow from Search to Analysis
Step-by-step guide to delineating flood extent using Sentinel-1 SAR data. Covers pre-event baseline selection, backscatter thresholding, and common interpretation mistakes to avoid.
Understanding NDVI: How to Monitor Vegetation Health from Space
A comprehensive guide to NDVI (Normalized Difference Vegetation Index) — what it measures, how to interpret values, and practical applications for agriculture, forestry, and environmental monitoring.
Change Detection from Space: Three Approaches That Actually Work
Not all change detection methods are equal. This post compares image differencing, NDVI time-series, and SAR coherence-based approaches with real-world guidance on when to use each one.
Beyond True Color: Sentinel-2 Band Combinations Worth Knowing
Sentinel-2 has 13 spectral bands, but most people only use RGB. This post covers the most practical band combinations for agriculture, water, urban mapping, and geology — and explains why each one works.
How to Monitor Any Area with Satellite Time Series: A Complete Guide
Area monitoring with satellite time series lets you automatically track changes in any region over weeks, months, or years. Learn how to set up a monitoring zone, choose the right index, and interpret results using Sentinel-1, Sentinel-2, and VIIRS data.
Frequently Asked Questions
Quick answers about the Watchfloor, Delta Agent, the Map, and Off-Nadir Delta.
Off-Nadir Delta is an intelligence platform that fuses world events, AI analysis, and satellite imagery to answer one daily question: where to look, why it matters, and which satellite sensor to task. It has three product surfaces: the Watchfloor, a daily global situational-awareness dashboard of geolocated world events (where to look today); Delta Agent, an AI intelligence analyst that returns sourced, geolocated briefs and recommends which sensor and area to image next (why it matters, which sensor); and the Map, a browser-based satellite-imagery workbench for Sentinel-1 SAR, Sentinel-2 optical, VIIRS nighttime lights, and NASA FIRMS active fires (look closer). No GIS software is required, and a free tier is available.
Start Reading the World Today
Jump back in — your Watchfloor, Delta Agent, and the map are one click away.