GPS Systems for

Signal distribution

+49 (0)89 99 01 63 80

E-Mail: info@aucon.de

Hohenlindener Str. 1

81677 München
GPS Systeme
Tel. +49 (0)89 99 01 63 80

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Signal distribution via optical fibre

  • Low signal attenuation
  • More affordable than coaxial cables
  • Easier to lay out
  • Up to 40% faster signal transit time
  • Usable for up to 5km and more (ideally suited for tunnels and mines)

Optical fibre cables are being used more and more commonly in new buildings, due to their low diameter and at the same time high transfer rate and due to almost any possible line lenght. For GNSS signal transmission, they are perfectly suited as well. Read more here:

PDF

Frequencies of the GNSS

GPS frequencies

The data signal, with a bit rate of 50 bit/s and a frame period of 30 s, is being transmitted on two frequencies at the same time, using a spread spectrum method:

L1 (1575 MHz)

The C/A code for civil use and the not poblicly known P/Y code for military use are being deployed on this frequency. The transmitted data signal is identical on both code sequences and constitues the 1500 bit long navigation message. The message needs half a minute to be transmitted and contains every important information on the satelite, such as date, identification number, corrections, orbit, but also the condition of the satelite. GPS receivers normally buffer these data. For the device initialisation, also the almanac data, which contain the rough orbiting data of all stelites, are being transmitted. The transmission takes about 12 minutes.

L2 (1227 MHz)

The second frequency transmits the P/Y code only. This frequency may solely be used for military purposes. By transmitting on two frequencies, the data accuracy can be improved.

L5 (1176 MHz)

This new frequency is supposed to further increase the stability of the reception and is intended for aviation and rescue service applications. It is still under construction.

GNSS

meaning Global Navigation Satellite System, is a system for positioning and navigation on earth and in the air by receiving signals from navigation satellites and pseudelites.

GNSS is a collective term for existing and future satellite systems:

  • GPS (Global Positioning System) – USA
    fully functioning since 1995
  • GLONASS (GLObal Navigation Satellite System) – Russia
    not fully functioning as of today
  • Galileo – Europe
    completion expected around 2020
  • IRNSS (Indian Regional Navigation System) – India
    functioning since 2016
  • Beidou (Chinese for the Big Dipper asterism)
    completion expected around 2020
  • QZSS (Quasi-Zenith Satellite System) – Japan
    completion expected around 2020
  • SBAS (Satellite Based Augmentation Systems)
    Are satellite based supplement systems, that support existing other satellite navigation systems.

More information: here.

Die verschiedenen Satelittensysteme verwenden unterschiedliche Frequenzen:

Frequencies of the GNSS

The different satellite systems use different frequencies:

Navstar GPS

The Navigational Satellite Timing and Ranging – Global Positioning System is the US-American satellite System. It was built up in the 70’s by the U.S. Department of Defense for military purposes and has been fully functioning since the mid 90’s. Read more about the frequency bands L1 (civil), L2 (military), L2C, L5 (under construction) and L6 here.
Link zu News Eintrag GPS frequencies

Glonass

is a satellite navigation system run by the Ministry of Defence of the Russian Federation. The buildup and the mode of functioning resemble the US-American NAVSTAR GPS. The two comparable systems were developed independently from one another at about the same time during the Cold War for military reasons. the Glonass development started in 1972 and was completed in 1996.

Galileo

is the european satellite navigation system, mainly for civil purposes. It is supposed to revolutionise the by now outdated GPS system and to prevent the EU’s dependency.

IRNSS

The Indian Regional Navigation Satellite System is a scheduled Indian system for satellite navigation, similar to the existing GPS, Glonass and the foreseen Galileo systems.

Beidou

is the navigation system of the People’s Republic of China. It has been in operation since 2004, however, the use is limited to the Asian area. As China is also involved in the European system Galileo, it is not yet clear, whether it will be fully completed.

QZSS

The Quasi-Zenith Satellite System is the Japanese satellite system, still under construction, which is supposed to complement the global navigation satellite systems. The stellite constellation consisting of 3 geosynchronous satellites was especially designed for Japan, but also other areas of the Asian-Pacific region will benefit from it.

OmniSTAR (satellite-based augmentation system)

is the worldmarket leader when it comes to transmitting DGNSS correction signals via satellite and is part of the Fugro Group, a globally operating service and consulting company. The OmniSTAR services were specifically designed to cover the need for exact positioning systems and the corresponding services for land-based applications.

Galilleo is waiting in the wings

22 satellites are already in space and 4 more will follow by the end of 2018. Galileo will be fully functioning then.

Advantages of Galileo

  • Increases the EU’s independency
  • Stable system
  • Signal authentification
  • Quicker TTFF (Time to first fix)

(Source: The operator’s presentation at the MSNS 2018)

 

Set-up of a GPS repeater unit

A high-performance outdoor antenna (e.g. on the roof of your building) receives the GPS signal and redirects it to one or more repeaters via special low-daming HF cables and GNSS splitters. The amplified signals are then being conditioned and radiated into e.g. a hangar or a test laboratory, via GPS transmitting antennas.

 

Certified partner of the German armed forces

The Federal Office of the Bundeswehr for Information Management and Information Technology has granted us the general permission to set up GPS repeaters on Bundeswehr premises. As a certified partner, we supervise the installation of components, issue installation records based on the ETSI standard EN 302 645 and grant help with all required formalities. If existing GPS systems need to be expanded, we gladly provide you with information in the current procedural method.

Certification (only in german) PDF

GPSRKL1M GPS Repeater

GPSRKL1M GPS Repeater

for GPS L1

Simple, military GPS Repeaterkit example for wheeled or tracked vehicles like Dingo, Boxer and Puma. Also for quick retrofitting or for a “flying” construction of troop carriers or armored vehicles. Easy plug & play installation.