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- Ein Pseudolit (englisch pseudolite, Kofferwort aus griechisch pseudo „falsch, vorgetäuscht“ und Satellit) ist ein terrestrischer Sender für Signale, welche diejenigen eines Satelliten nachahmen. Pseudoliten werden z. B. errichtet, um lokal die Messgenauigkeit von satellitengestützten Navigationssystemen, z. B. GPS, zu erhöhen. Für einen GPS-Empfänger erscheinen Pseudoliten nämlich als zusätzliche Satelliten. Die Rechtslage des Sendebetriebs ist unklar, denn Pseudoliten senden auf Frequenzen, die nach den Vorgaben der ITU eigentlich Satelliten vorbehalten sind. Pseudoliten werden auch eingesetzt, um Signale für Satellitenradio in Städten zu verbreiten. In tiefen Straßenschluchten zwischen Hochhäusern wäre sonst kein Empfang möglich. Für die Bodensegment-Netzwerke hat sich in Amerika der Begriff Ancillary terrestrial components (ATC), in Europa Complementary Ground Component (CGC) eingebürgert. (de)
- Pseudolite is a contraction of the term "pseudo-satellite," used to refer to something that is not a satellite which performs a function commonly in the domain of satellites. Pseudolites are most often small transceivers that are used to create a local, ground-based Global Positioning System (GPS) alternative. The range of each transceiver's signal is dependent on the power available to the unit. Being able to deploy one's own positioning system, independent of the GPS, can be useful in situations where the normal GPS signals are either blocked/jammed (military conflicts), or simply not available (exploration of other planets).Pseudolites are normally used to augment the GPS by improving dilution of precision (DOP). Or pseudolites are also used to implement GPS-like indoor location systems, where pseudolites are acting as GPS satellites. Pseudolites use cheap voltage controlled oscillator, so pseudolite based location system shall provide a methodology to compensate clock differences among pseudolites. For planetary exploration, research being conducted at facilities including NASA's Ames Research Center and Stanford University (see link at bottom) may allow a rover to deploy an array of pseudolites with no particular accuracy and still calibrate the system to centimeter-level resolution without human assistance. This would aid a rover's path-finding routines and increase the safe maneuvering speed of the unassisted vehicle. The concept is sometimes referred to as a Self-Calibrating Pseudolite Array (SCPA). Other applications of pseudolite arrays include precision approach landing systems for aircraft and highly accurate tracking of transponders. Pseudolites have started to gain more and more attention in the context of indoor location. (en)
- Lo pseudolite (contrazione di "pseudo-satellite") è un trasmettitore GPS installato, prevalentemente in modo stabile, a terra. Questo tipo di trasmettitori consente l'evoluzione terrestre dei servizi GPS. I segnali emessi dagli pseudoliti simulano quelli emessi dai satelliti, consentendo una localizzazione maggiormente accurata ed affidabile grazie al fatto di essere più vicini ai ricevitori rispetto ai tradizionali trasmettitori GPS installati a bordo dei satelliti. Gli pseudoliti possono incrementare la copertura GPS in ambienti ostili come i canyon urbani oppure consentono la realizzazione di servizi di localizzazione in ambienti indoor stand alone (impianti autonomi per uso interno) o integrati con la rete satellitare GPS. (it)
- En pseudosatellit är en markbaserad enhet, det vill säga inte en satellit, som utför uppgifter som påminner om dem som en satellit utför. Den vanligaste typen av pseudosatellit är markbaserade GPS-stationer som sänder ut en signal med en struktur liknande den för en verklig GPS-satellit. Dessa har börjat användas för att bestämma positioner inomhus. (sv)
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- Lo pseudolite (contrazione di "pseudo-satellite") è un trasmettitore GPS installato, prevalentemente in modo stabile, a terra. Questo tipo di trasmettitori consente l'evoluzione terrestre dei servizi GPS. I segnali emessi dagli pseudoliti simulano quelli emessi dai satelliti, consentendo una localizzazione maggiormente accurata ed affidabile grazie al fatto di essere più vicini ai ricevitori rispetto ai tradizionali trasmettitori GPS installati a bordo dei satelliti. Gli pseudoliti possono incrementare la copertura GPS in ambienti ostili come i canyon urbani oppure consentono la realizzazione di servizi di localizzazione in ambienti indoor stand alone (impianti autonomi per uso interno) o integrati con la rete satellitare GPS. (it)
- En pseudosatellit är en markbaserad enhet, det vill säga inte en satellit, som utför uppgifter som påminner om dem som en satellit utför. Den vanligaste typen av pseudosatellit är markbaserade GPS-stationer som sänder ut en signal med en struktur liknande den för en verklig GPS-satellit. Dessa har börjat användas för att bestämma positioner inomhus. (sv)
- Ein Pseudolit (englisch pseudolite, Kofferwort aus griechisch pseudo „falsch, vorgetäuscht“ und Satellit) ist ein terrestrischer Sender für Signale, welche diejenigen eines Satelliten nachahmen. Pseudoliten werden z. B. errichtet, um lokal die Messgenauigkeit von satellitengestützten Navigationssystemen, z. B. GPS, zu erhöhen. Für einen GPS-Empfänger erscheinen Pseudoliten nämlich als zusätzliche Satelliten. Die Rechtslage des Sendebetriebs ist unklar, denn Pseudoliten senden auf Frequenzen, die nach den Vorgaben der ITU eigentlich Satelliten vorbehalten sind. (de)
- Pseudolite is a contraction of the term "pseudo-satellite," used to refer to something that is not a satellite which performs a function commonly in the domain of satellites. Pseudolites are most often small transceivers that are used to create a local, ground-based Global Positioning System (GPS) alternative. The range of each transceiver's signal is dependent on the power available to the unit. Other applications of pseudolite arrays include precision approach landing systems for aircraft and highly accurate tracking of transponders. (en)
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- Pseudolit (de)
- Pseudolite (it)
- Pseudolite (en)
- Pseudosatellit (sv)
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