How GPS Works Without Internet or Cell Service

GPS Satellites: Explained Simply

The Global Positioning System (GPS) is a constellation of satellites operated by the United States Space Force. Here is how it works at the most fundamental level:

• 31 satellites orbit Earth at an altitude of about 20,200 km, in medium Earth orbit
• Each satellite carries an extremely precise atomic clock and continuously broadcasts a radio signal that includes the satellite's ID, its current position in orbit, and a precise timestamp
• These signals travel at the speed of light toward Earth's surface
• A GPS receiver on the ground receives signals from multiple satellites simultaneously
• By measuring the time it took for each signal to arrive, the receiver calculates the distance to each satellite
• With distances to at least 4 satellites, the receiver can calculate its exact 3D position (latitude, longitude, altitude) through a process called trilateration

The critical point: this entire process is one-way. The satellites broadcast. Your receiver receives. Your receiver never transmits anything back to the satellites. The satellites have no idea your device exists. There is no internet connection involved at any step.

GPS works the same way whether you are in a city centre or on a remote mountain. The satellites do not care. They are just broadcasting.

Why GPS Itself Needs No Internet

GPS is fundamentally a passive, receive-only system for end users. The signal chain from satellites to your receiver involves only radio waves traveling through the atmosphere. No network connection, no server, no data plan.

Your car's built-in GPS navigation has worked offline for decades. Dedicated hiking GPS units like Garmin eTrex devices have always worked without cellular. Aviation navigation systems calculate position with no internet connection. All of these use the same GPS satellite signals — no internet required.

The GPS standard even deliberately avoids encryption or access control on the civilian signal band (L1, 1575.42 MHz) — it is intentionally designed to be receivable by anyone with a compatible receiver, anywhere on Earth, for free.

A GPS receiver chip costs a few dollars. It draws a modest amount of power. And it calculates precise position coordinates from nothing but radio waves from space — no subscription, no connection, no cloud.

What DOES Need Internet: Most Commercial GPS Trackers

So if GPS itself is offline, why do most GPS trackers need a cellular data plan?

The answer lies in the second part of the problem: getting your location from the tracker to your phone.

GPS tells the tracker where it is. But a tracker sitting in a field, on a dog's collar, or on a drone is physically separate from you. Someone needs to transmit those GPS coordinates to your device. That transmission is where most manufacturers introduce the internet dependency.

The typical architecture of a cellular GPS tracker:

1. GPS chip calculates coordinates (offline, no internet needed)
2. An embedded SIM card connects to a cellular network (requires a data plan)
3. Coordinates are uploaded to the manufacturer's cloud server (requires internet)
4. Your phone app queries the cloud server over the internet (requires internet)
5. The app displays the location on a map

Steps 2, 3, and 4 all require internet infrastructure. Remove cellular coverage and the entire chain breaks after step 1. That is why cellular GPS trackers fail in remote areas — not because GPS stopped working, but because the transmission layer lost connectivity.

This is an architectural choice, not a technical necessity. There is another way to transmit GPS coordinates without the internet.

How LoRa Replaces Cellular for Transmitting Coordinates

LoRa (Long Range) radio is an alternative transmission technology that can carry GPS coordinate data over long distances without any cellular infrastructure.

LoRa uses unlicensed ISM radio bands (868 MHz in Europe, 915 MHz in North America) to transmit small data packets — including GPS coordinates — directly from one device to another. It is point-to-point radio, similar in concept to a walkie-talkie, but with far greater range and far lower power consumption.

A LoRa radio transmitting at 14 dBm can reliably send a GPS coordinate packet across 15–20km of open terrain. The receiver does not need to be connected to the internet, a cellular tower, or any infrastructure. It just needs to be within radio range.

This is exactly what Loko does. The GPS coordinates calculated by the Loko Air tracker are transmitted over LoRa to the Loko Ground receiver in your hand — bypassing the internet entirely. The transmission layer is as offline as the GPS reception layer.

The Full Offline Chain: Satellite to Screen

Here is the complete signal path in the Loko system — note that every step is local radio with no internet involvement:

How GPS Works: FAQ