Timeline for How do pilots fly an MLS approach?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Mar 18, 2017 at 18:40 | vote | accept | CommunityBot | moved from User.Id=14897 by developer User.Id=59471 | |
| Mar 17, 2017 at 11:51 | comment | added | Gerry | @mins It was a rational decision at the time. GPS was the disrupter technology. The strange part is that after the FAA moved towards GPS, the USAF actually moved to add MLS to its capabilities as it solved an issue with all-weather ops in bare sites. The key advantage was the minimal setup time. They went out in the late 90's to create mobile MLS (MMLS) ground stations that could be deployed in a C-130. Most tanker and transports are now MLS equipped. | |
| Mar 16, 2017 at 17:38 | comment | added | mins | @Gerry: TRSB-MLS was adopted in 1978 by ICAO (UK tried to impose the Doppler-MLS). The first GPS satellite was launched the same year and GPS was operational (24 satellites) only in 1995, still military (US), and subject to selective availability until 2000. So I guess at the time MLS was a good strategy, the only credible alternative to ILS and the best choice for curved approach. | |
| Mar 16, 2017 at 13:15 | comment | added | Gerry | @ymb1 Thanks for catching the typo in the acronym soup. | |
| Mar 16, 2017 at 12:44 | history | edited | user14897 | CC BY-SA 3.0 |
you meant SBAS right? i did the same mistake yesterday on chat, called it SBAB :D
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| Mar 16, 2017 at 12:30 | comment | added | Gerry | @ymb1 Yeah, right. Compared to ILS, you just move from an AM radio with a static antenna array to microwave phased array scanning beams with DPSK coded data words interspersed in the stream. To be fair though, the costs did drop in the 90's with the introduction of custom ASICs and FPGAs. But today, it's still at 3 times as expensive as ILS. | |
| Mar 16, 2017 at 12:10 | history | answered | Gerry | CC BY-SA 3.0 |