The primary operational GPS alternatives are other satellite navigation systems operated by foreign governments, including Europe’s Galileo and China’s BeiDou. Xona Pulsar in low Earth orbit and land-based eLoran are the other options, and the sources reviewed do not show any of them fully replacing GPS today.
The Alternatives to GPS
The table below lists the principal operational and developmental alternatives to the United States Global Positioning System (GPS). As of 13 September 2026, the U.S. Coast Guard Navigation Center lists 32 operational GPS satellites. GPS satellites orbit at about 20,200 km.
| System | Operator | Architecture and Orbit | Constellation Size | Coverage Area | Status |
|---|---|---|---|---|---|
| Galileo | European Union (EU) | Medium Earth orbit (MEO), 23,222 km altitude | 28 satellites, 2 of them used for search and rescue | Global | Initial Services declared 2016 |
| BeiDou (BDS-3) | People’s Republic of China | MEO, GEO and IGSO (see size column) | 35 per archived GPS.gov; 50 per People’s Daily Online (13 March 2026); the UN Office for Outer Space Affairs (UNOOSA) counts 3 geostationary (GEO), 3 inclined geosynchronous (IGSO) and 24 medium Earth orbit (MEO) | Global | Formally commissioned 2020 |
| GLONASS | Russian Federation | Not stated | 24+ satellites | Global | Global system; a fully operational constellation has 24 or more satellites |
| NavIC | Government of India | GEO and Geosynchronous | 7 satellites (3 GEO, 4 Geosynchronous) | Regional (India plus 1,500 km) | Regional system; the Indian Space Research Organisation (ISRO) expects accuracy better than 20 m in the primary service area |
| QZSS | Government of Japan | Not stated | 4 at the 2018 start of services; 7 planned by 2023 per GPS.gov (may be out of date) | Regional (East Asia and Oceania) | Japan declared the start of services in 2018 |
| Pulsar | Xona Space Systems | Low Earth Orbit (LEO) | 6 launched; planned size varies by source, more than 250 to about 300 | Not stated | Six launched in October 2026; Xona says four will begin serving customers in 2027 |
| eLoran | Not stated | Land-based transmitters and monitor sites | Ground stations and monitor sites | Not stated | U.S. deployment status unconfirmed |
Global Navigation Satellite System (GNSS) is the umbrella term for satellite constellations that broadcast positioning, navigation, and timing (PNT) data around the planet.
Global Satellite Navigation Systems
Galileo, BeiDou and GLONASS are global systems owned and operated by the European Union, China and the Russian Federation.
European Union Galileo
Galileo is owned and operated by the European Union as a guaranteed global positioning service under civilian control. The European Union declared Galileo Initial Services in 2016. The European Space Agency announced in July 2026 that two new Galileo satellites, SAT 33 and SAT 34, entered operational service. According to the European Space Agency (ESA), the constellation consists of 28 satellites in total. That figure in this section and the table may be out of date.
All but two of the spacecraft fly in three circular orbital planes at an altitude of 23,222 kilometers. The remaining two satellites were injected into incorrect orbits due to a Soyuz launcher error. They are used for search-and-rescue operations rather than standard navigation. The European Space Agency states that Galileo provides a guaranteed positioning service delivering real-time accuracy down to the metre range when using dual frequencies.
China BeiDou Navigation Satellite System
BeiDou is owned and operated by the People’s Republic of China. BeiDou was formally commissioned in 2020 as a global system.
GPS.gov states that the operational system consists of 35 satellites. That GPS.gov page is archived. People’s Daily Online reported on March 13, 2026 that BeiDou had 50 operational satellites in orbit, so the count depends on the source and date. A UN Office for Outer Space Affairs slide deck counts BDS-3 as 3 geostationary, 3 inclined geosynchronous and 24 medium Earth orbit satellites.
Russian Federation GLONASS
GLONASS is owned and operated by the Russian Federation. Historical documentation maintained on the U.S. Government GNSS portal states that a fully operational GLONASS constellation consists of 24 or more satellites. GLONASS provides worldwide coverage.
Regional Satellite Navigation Systems
India NavIC Network
NavIC, formerly designated the Indian Regional Navigation Satellite System (IRNSS), is owned and operated by the Government of India. Documentation from the ISRO Navigation Program and the ISRO Navigation FAQ indicates the constellation uses seven satellites: three in geostationary orbits and four in geosynchronous orbits.
ISRO defines the primary service area as the landmass of India and the surrounding region extending up to 1,500 kilometers beyond its national boundaries. An extended service area spans a geographical rectangle running from latitude 30 degrees south to 50 degrees north and longitude 30 degrees east to 130 degrees east. ISRO documents state that NavIC is expected to provide position accuracy of better than 20 meters across the primary service zone.
Japan QZSS Constellation
The Quasi-Zenith Satellite System (QZSS) is operated by Japan. Japan declared the formal start of QZSS services in 2018 with four satellites.
Historical program plans cited by GPS.gov outlined an expansion to seven satellites to establish independent regional positioning capabilities. QZSS complements GPS to improve coverage in East Asia and Oceania.
Jamming and Spoofing Threats to GPS
At a March 2026 hearing, Lieutenant General Doug Schiess said jamming and spoofing are a current and growing threat to GPS. GPS modernization explained covers the hearing.
- Jamming floods the frequency with noise so the receiver loses its fix (how GPS jamming works).
- Spoofing sends counterfeit signals so the receiver reports a wrong position confidently (GPS spoofing explained).
Low Earth Orbit Navigation Systems
Xona Space Systems is developing a commercial constellation named Pulsar, detailed in Xona Space Systems explained. Pulsar satellites operate in low Earth orbit, which LEO satellites explained covers.
Xona launched six Pulsar spacecraft on the Bandwagon-5 rideshare flight in October 2026 and says four of them will begin serving customers in 2027. Planned constellation size varies by source, from more than 250 to about 300 satellites.
Pulsar broadcasts two signals, X1 and X5, in the same L-band GPS uses. Xona says the signals do not interfere with existing signals and that Pulsar carries a cryptographically authenticated signal to resist spoofing. Xona describes Pulsar as working alongside GPS and other national systems. Xona does not describe it as a replacement.
Broader constellation architectures and deployment mechanics are covered in satellite constellations explained.
Terrestrial and Land-Based Alternatives
eLoran is a land-based system investigated as a complementary PNT capability to GPS.
In March 2015, the U.S. Department of Transportation sought public comment, as an Inside GNSS report describes, on plans to investigate eLoran as a complementary backup to GPS. The notice said performance “would vary widely depending on the number of transmitters and monitor sites”. Public comments closed in May 2015.
The sources reviewed do not confirm whether a U.S. eLoran network has since been built or funded.
Resilience Frameworks and Non-GPS Backups
The Cybersecurity and Infrastructure Security Agency (CISA) lists a Report on PNT Backup and Complementary Capabilities to the GPS and the Resilient PNT Conformance Framework (Version 2.0). CISA also lists the Epsilon Algorithm Suite, which CISA says gives end users “basic spoofing detection capabilities” without changes to existing GPS receivers.
OrbitalIntel’s GPS spoofing explained says aircraft and ships keep a position or time source that does not come from GPS:
- Inertial navigation
- Ground-based aids
- Radar fixes
Crews compare the satellite position against these sources.
Choosing a Backup Source
For most phone and car users, the practical alternative is a receiver that also tracks other satellite systems. For critical infrastructure, the need is a source that does not share GPS’s failure modes. The sources reviewed describe that as work in progress.
What would change this answer: a fielded land-based or LEO service with published performance.