Save the date: GPS Week Number Rollover Event – April 6th 2019

19th November 2018

If your networks or systems use Coordinated Universal Time (UTC), April 6th 2019 is probably a date worth marking in advance.

On, or possibly after, this date, some GPS receivers may start to behave strangely.  The data they output may jump backwards in time, resulting in month and year timestamps that are potentially up to 20 years out of date. This is a known issue; in April 2018 the Department of Homeland Security in the United States issued a memo to make GPS users aware of the situation.  Any changes, adjustments, or other actions are ultimately the responsibility of the user, so DHS strongly recommends owners and operators of critical infrastructure to prepare for the rollover. This refers to the GPS Week Rollover on Coordinated Universal Time (UTC) derived from GPS devices.

Automotive research facility benefits from GPS, DAB radio and FM radio signal repeater system

23rd April 2018
To enable development and testing of infotainment systems, FalTech has designed and installed a multi-function repeater system inside a research facility which previously was an RF-denied zone. Background: Vehicle infotainment consoleIn-Vehicle Infotainment (IVE) and In-Car Entertainment (ICE) systems are integral to most vehicles these days. In this connected world, the minimum expected level of equipment in a new car includes FM/DAB radio and GPS satellite navigation systems. Not to mention video players, in-car internet and WiFi, USB and Bluetooth connectivity and eCall technology. One automotive company that FalTech GPS worked with was having a problem with a lack of GPS, FM and DAB signals inside their research building due to the blocking effect of the largely steel structure. The situation caused frustration and delays as the only way to test any of these systems was to take the prototype vehicles outside in order to receive a usable signal.

Flashback to July 2015: Iridium repeaters are flavour of the month

6th July 2017
In mid-2015 the supply and installation of GPS repeaters was in full flow. We were working with a number of fire services, police forces and hangar operators among others; the number of system sales was fast approaching 500 from the first three years of business. Alongside this activity, we received a number of enquiries for a repeater that would allow use of Iridium voice and data equipment indoors. Now, apart from a basic understanding of what Iridium is, I had no idea if such a repeater system existed. So I did what anyone in the same situation would have done – some serious Googling!

What did I find?

Well, the Iridium satellite constellation is a fascinating thing. The home page of the Iridium Inc. website says it all in one concise statement “The world’s only truly global mobile satellite communications company”. Iridium Coverage Based in Virginia, USA, the company operates 66 low-Earth orbiting (LEO) cross-linked satellites that constitute the world’s largest commercial constellation. The graphic shows the satellites rotating the earth in a pole-to-pole direction, arranged in 6 orbits of 11 satellites each. No matter which way you look at this – Iridium is seriously cool technology. Of course it has a serious side to it as well; the Iridium network provides critical communications coverage anywhere in the world, crucially where there is no primary communications network (landline or cellular) available. However, in common with a lot of wireless communications systems – it generally doesn’t work indoors due to the blocking nature of the building structure.

Next question: who makes an Iridium repeater to facilitate indoor use?

Up until now we had specialised in GPS repeater systems which provide a one-way signal path from orbiting satellites into any indoor space that is otherwise signal-deprived. By comparison, Iridium traffic is a two-way situation; there is an incoming (downlink) and an outgoing (uplink) signal path. After much research and a few long-distance phone calls, FalTech agreed to promote and distribute a range of military-grade Iridium repeater systems from Foxcom, based in Israel. They’re extremely robust (DO NOT drop one on your foot!) repeater systems were designed and built initially for the Israeli military; they allow coverage indoors up to 3Km away from the outdoor antennas using optical fibre technology. Iridium repeater system   There is also a coaxial-only repeater system for situations where a long optical fibre link isn’t required; essentially the outdoor and indoor units have been combined into one single enclosure with connections for two outdoor and two indoor antennas. There is a lot more information within this site about different applications for an Iridium repeater – please take a look and let us know if we can help you with your indoor coverage requirements. Phil Whitting FalTech GPS 01326 336 444        

Contact FalTech

FalTech Limited,
6A Waterside House,
Falmouth Road,
Penryn,
Cornwall,
TR10 8BE, United Kingdom.
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FalTech Limited is registered in England and Wales under company registration number 6934844.
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