3 GPS – Orientation Mode
3.1 General Description
The StellarTrek was primarily designed as an orientation aid to help you find your way. The
StellarTrek locates your position through the Global Positioning System (GPS) and relates it to
digital maps of your area. You can record your routes while walking them. The StellarTrek then
provides step by step instructions on how to navigate them. With the StellarTrek, you can explore
your surroundings and let the device announce street information as they are encountered.
After you charge up your StellarTrek and first power it on, it is required that you connect to your
home Wi-Fi network if one is available. Connecting to Wi-Fi ensures you are running the latest
version of the StellarTrek software, and in addition allows the StellarTrek software to download the
updated GPS satellite information prior to you going outdoors to navigate. Having that latest GPS
satellite info downloaded ahead of time will greatly speed up the GPS acquisition time when you
go outdoors. Note that no maps are installed upon using the device for the first time; they need to
be downloaded (see section 2.5 for more details).
Upon first booting the device, the StellarTrek may need some time to acquire GPS satellite
coverage. This is due to the device downloading the satellite data and learning where you are on
the globe. Once you receive the connection to the satellites, your position is remembered for three
days. This ensures that if you use your StellarTrek regularly, you will consistently acquire satellite
reception within 5 to 30 seconds on average.
It is recommended to frequently connect to Wi-Fi to ensure the latest satellite data is updated.
Warnings: The StellarTrek system is designed as an orientation aid only and must not, at any time,
be used as the only aid while traveling. When using StellarTrek, users should always be vigilant,
stay alert and pay attention to the immediate surrounding area. A conventional mobility aid like a
white cane or a guide dog should also be used. The StellarTrek is not meant to be used as a solo
mobility device, but along other forms of mobility tools as mentioned previously. It is the user’s
responsibility to use this device with caution. Do not use headphones while walking on the street.
Do not use the StellarTrek as a car GPS.
The accuracy of GPS location information for commercial products such as the StellarTrek is
currently more or less 5 meters (15 feet). However, this can vary depending on a number of factors
including:
- How clear a view of the sky does the GPS receiver have?
- Are there obstructions blocking signals such as tall buildings or overhangs?
- The position of the satellites being tracked: overhead, on the horizon or somewhere in between.
- How many satellites are being tracked?
- Is there a presence of cloud cover or overhead power lines?
- How fast is the user moving?
Note: The StellarTrek uses the following constellations: GPS, GLONASS, Galileo and Beidou,
allowing an optimal usage of the device depending on your location.
3.1.1 Maps Installed in your Device
The GPS system uses electronic maps to provide detailed and handy information about all street
names and ranges of addresses for urban areas, as well as points of interest such as banks,
restaurants, pharmacies.
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