Navigation: Trend and challenges

#News(IoTStack) [ via IoTForIndiaGroup ]

Bringing an end to navigation for manned/unmanned vehicles, the technology on the Positioning, Timing, Sensing and Communication should be essential. Though, first of all the latest trends on these technologies will be mentioned, and the challenges to new generation will be done.

Positioning and Timing Today it has been past quarter centuries since starting GPS operation in full running in 1990s. Now, GPS (USA): GLONASS (Russia): CDMA, GALILEO (EU): FOC and Bei Dou (China) are running as GNSS, and IRNSS (India) and QZSS (Japan) as RNSSs. Almost entirely prospects that until 2020 these all systems will be operating in full running would be done, and it would be coming into the Navigation era when it would be said not possible to navigate without GNSS. Increasing infrastructures on G/ RNSS in intensity, GNSS receivers also have been changed to multi-GNSS and multi-Sensors in an attempt to improve the vulnerability of G/RNSS.

G/RNSS will be available in the area of outdoor positioning including urban, and positioning accuracy will be sub-meters or cm order from traditional positioning accuracy 10 meters adding application of QZSS.

Ground wave Radio Navigation In case of G/RNSS, it is not possible to apply the Positioning and Timing under the ground such as subway or tube and tunnel. Though, it will be difficult to apply the traditional Ground wave Radio Navigation even such as eLoran or Loran C for land navigation. ELoran will be applied to Marine Navigation and Aviation for back up of GNSS vulnerability such as jamming and spoofing.

Multi-Sensors IMU is applied to GNSS receiver for automobile navigation according to anti-vulnerability of GNSS, but at present it is just difficult to keep required accuracy for long time depending of GNSS positioning accuracy. Error is affected by the time, so it will enlarge in case of stopping or very slow speed in long time.

Anti-Jamming/Spoofing In aviation, the development of phased array GNSS antenna is advanced for not only anti- Jamming/Spoofing but also stable platform to protect the missing satellites due to changing vehicle’s attitude.

Indoor Positioning Recently, Indoor Positioning System has been applied with WiFi System of which positioning would be done by the measuring the receiving signals’ level and several referring markers set up at known fixed points. The accuracy is said 1 meter or sub-meters at present and apply the human being movement in the building or so. Moving robots and small indoor drone will be able to contribute the safety evacuation system indoor field and advance toward seamless navigation indoor from/to outdoor.

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