spire-emblem Sense™

Operate Intelligently
More Ships, More Often

Advanced Maritime domain awareness

Terrestrial AIS is incredibly effective, from both cost and functionality standpoints, when deployed around ports where hundreds of ships are tightly packed. Unfortunately, it simply doesn’t work or isn’t cost effective in the open ocean or near remote coastlines. That’s where Satellite-AIS (S-AIS) comes in - offering excellent coverage in the most remote places.

Powerful Satellite Coverage + Terrestrial Ais

In October 2016, our customers had access to about 1.1M S-AIS messages per day.

_11,674,549 Messages

Industry-leading Improvements in Revisit Time

Spire's launch strategy has new satellites entering orbit nearly every month. That pays large dividends in revisit time - the ability to see more ships, more often. Satellites will continue to be launched on a near-monthly basis throughout 2017 and beyond, leading to immediate improvements for customers, especially over polar regions. No other AIS provider makes system-wide improvements as fast as Spire.

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Data latency distribution map

Simulated Latency Distribution for 15 Satellites

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Getting Started

At our heart, we’re a data company. We’ve crunched the numbers on the competition - everything from future coverage outlook to actual revisit times and latency. If you’d like to learn more about Spire and its competition, please get in touch.


Simple API-Based integration

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Your integration can get and query messages in JSON or XML via our RESTful API or stream AIS NMEA data directly to your servers through a secure TCP connection.


Custom Data Filtering

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Not all applications are as straight-forward as plugging our data firehose into your software. If you require custom data filtering, Spire can develop custom data filtering based on your specifications.

“We think about improvement on an exponential level - not linearly. That’s why we iterate quickly with new hardware, new software, and new launches. With each percentage improvement, we get closer to doubling our performance again”
Peter Platzer, Spire

In the second half of 2016, Spire increased the number of its S-AIS messages downloaded by 10x. Several more rounds of satellites, hardware improvements, and software updates still continue to push performance to new levels.

Wide-scale Improvement

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Spire’s LEMUR satellites continue to receive software improvements, even while in orbit. Those updates can often double or triple the amount or quality of AIS data downloaded from a particular satellite.

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Launches are scheduled for nearly every month of the year and each batch of satellites contains advancements in hardware. Updates to antennas, radios, electrical systems, and computing power all have the benefit of increasing data quality.

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Data latency is the achilles heel of many satellite based systems. New ground stations are constantly being rolled out across the planet - especially in hard to reach places. Furthermore, software updates can deployed to those sites within minutes from Spire’s control system.


Access Constellation Analytics

Customer Portal


SpireSense API Documentation

Developer Portal



December 05, 2016
December 05, 2016

Introducing AirSafe: Aircraft Tracking Service

Spire adding new service that meets tracking standards set in wake of MH 370

November 25, 2016
November 25, 2016

Historic Maneuver: Cygnus Boosts Altitude After ISS Undocking for Deployment of Spire Satellites

With NASA approval, Cygnus deploys Spire satellites into higher orbit after space station resupply mission

Learn More

Learn about how we utilize data at Spire and how we funnel those into other platforms and mediums.

Global GPS-RO Data



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The Spire Reference is a collection of miniature articles about topics mentioned throughout the Spire website. Each topic contains additional citations for further reading.