Blog

Keep up to date with all the latest news & developments from Sampson Technology here.

Garmin & L5                                                                                                          January 2021

Recently Garmin have released an outdoor handheld device which included the L5 GNSS signal capability called the Garmin GPSMAP 66sr. This is one of the first commercially available consumer devices which includes the L5 signals so we thought we would see if we could demonstrate the advantages of L5 signals.

L5 signals are a new generation of signals on the 1146.45MHz frequency and are available for civilian use. As the L5 Band is the furthest away from the L1 signal of GPS (1575.42) the receiver can mitigate the effects of the atmosphere on the signal. This variable slowing down of the signal transmission from space is the largest single cause of GNSS device position error. It mitigates this effect by the fact that both signals leave the satellite at the same time and position and the receiver can compare and remove the error.

The L5 signals improve the accuracy of the receiver and have for example the advantage of being visible worldwide with the satellite rather than SBAS corrections which being on a satellite only over the equator often suffer from obscuration in valleys, urban canyons etc.

We wanted to see what effect the L5 signal would have on multipath and higher elevation mask angles as if the signal was denied in high sided mountain valleys and urban canyons. Discover what happened here.

Labsat 3 Test                                                                                                      December 2020

Can I use a Labsat 3 Wideband Record & Replay System to test to ETSI EN 303 413?

LabSat is Racelogic’s GNSS Signal replicator, which gives you the ability to record and replay real GPS/GLONASS/BDS/Galileo RF data, as well as user generated SatGen scenarios. 

The advantages of using the LabSat as a GNSS simulator comes primarily from the fact that each time you replay a scenario it will be the same, and therefore consistent, repeatable signals are provided to the system under test.  This is not the case with using live-sky testing alone, where satellite position, multipath, and atmospheric conditions are constantly changing.  This makes for highly cost-effective testing, as you will have credible, unambiguous results with a reduction in travel and testing time often associated with repeating live-sky GPS tests.  Recording GNSS scenarios with LabSat means that you can reduce the amount of live-sky testing associated with GPS/GLONASS/BDS receiver testing, by recording a test once, and then playing back the recorded scenario on the test bed as many times as you require. All LabSat products are manufactured with an anodized aluminium casing that ensures that the devices will survive the knocks experienced in field testing. Read the full article here.

Labsat 3 Wideband                                                                                              August 2020

New Firmware 1.01.675 update is available on the LabSat website. This release includes improved large SSD handling and other important bug fixes. Full upgrade instructions and download are available on the LabSat Support section of the website.

Coronavirus Update                                                                                              June 2020

During the coronavirus lock down many LabSat customers are taking advantage of the portability and convenience of LabSat 3 and SatGen software to continue GNSS testing at home. The simplicity of LabSat allows engineers to continue to test in any home office without the need for external antennas or wiring. With a worldwide library of GNSS scenarios testing can continue seamlessly and easily.