Buying Guides8 min read
Long Battery GPS Trackers: Reading a Ten-Year Claim Properly
Every long battery figure in this market is quoted at one position fix a day. Change that setting and a ten-year tracker becomes a ten-week one.
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✦ Magic and Science in Action
A little magic. A lot of science. And GPS, finally explained.
Mo’ Saci Science is a friendly hub for understanding GPS, GNSS and the technology behind knowing where anything is. Satellites, signals and trackers, made clear.
MoSaciScience is not Mosaic Science. Looking for the magazine? Visit Mosaic Science.
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Who is Saci, and why GPS?
Saci is a one-legged trickster from Brazilian folklore who wears a red magical cap. As people who build with science and technology, we think the best ideas come from keeping that childlike wonder alive. So we put “Mo’ Saci” into science, and pointed all that curiosity at one beautifully practical question: how do we always know where things are?
Read our story →Start here
Your GPS hub, four doors in
Pick a path. Everything connects.
The 60-second version
Every GPS fix is just three parts working together
🛰️01
Space Segment
A constellation of 30+ satellites circling Earth twice a day, each broadcasting its position and a precise time.
📡02
Control Segment
Ground stations that track every satellite, check its health and keep its clock honest to the nanosecond.
📱03
User Segment
The receiver in your phone, car or tracker that listens to several satellites and works out exactly where it is.
The constellations
Meet the systems behind your blue dot
GPS is one of four global networks circling overhead right now. Most modern receivers listen to all of them at once. Hover a system to follow its satellites.
Fresh from the blog
Field notes worth your time
Buying Guides9 min read
7 GPS Trackers for Trucking, Compared on Compliance, Term and Published Cost
Trucking is the one segment where the tracker is also a legal obligation, which changes the shortlist and hands most of the power to the vendor.
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GPS Tracking8 min read
Disposable Shipment Trackers: When a Tracker You Never Get Back Is the Cheaper Option
Reusable trackers assume the asset comes back. On a one-way freight lane nothing comes back, which changes the economics of the whole decision.
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Where to go next
GPS tracking beyond the theory
We explain the science and do not sell hardware. When readers ask where tracking actually gets used, these are the pages worth a look.
Stay curious
Got a GPS question we haven’t answered yet?
Send it our way. We turn the best questions into clear, friendly guides.