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Re: What do you think about this airline vs 5G brouhaha?
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Thu, 20 Jan 2022 15:00:06 +0900
Jay wrote:
By adding an LC bandpass filter will add to the propogation delay of the receiver. When the round-trip time of the echo at 1000 feet is only 2 microseconds, that added delay will throw the RA out of calibration.
Altitude error by the delay is proportional to wavelength of signal (in this case, 3 inches or so) and shouldn't be so serious. > Perhaps the calibration circuitry can deal with this added delay. According to the following patent filed in 1997: https://patents.google.com/patent/US6008754A/en Current radio altimeter calibration technology requires the radio altimeter to be calibrated by adjusting the length of the cable connecting the radio altimeter to its antenna during installation. old altimeters may have some difficulty to fully calibrate the delay. Masataka Ohta
Current thread:
- Re: What do you think about this airline vs 5G brouhaha?, (continued)
- Re: What do you think about this airline vs 5G brouhaha? Brandon Martin (Jan 20)
- Re: What do you think about this airline vs 5G brouhaha? Jay Hennigan (Jan 21)
- Re: What do you think about this airline vs 5G brouhaha? Michael Thomas (Jan 21)
- Re: What do you think about this airline vs 5G brouhaha? Mel Beckman (Jan 21)
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- Re: What do you think about this airline vs 5G brouhaha? Mel Beckman (Jan 21)
- Re: What do you think about this airline vs 5G brouhaha? Jay Hennigan (Jan 21)
- Re: What do you think about this airline vs 5G brouhaha? Masataka Ohta (Jan 18)
- Re: What do you think about this airline vs 5G brouhaha? Jay (Jan 19)
- Re: What do you think about this airline vs 5G brouhaha? Masataka Ohta (Jan 19)
- Re: What do you think about this airline vs 5G brouhaha? Jay Hennigan (Jan 19)
- Re: What do you think about this airline vs 5G brouhaha? Tom Beecher (Jan 19)
- Re: What do you think about this airline vs 5G brouhaha? Carsten Bormann (Jan 20)
- Re: What do you think about this airline vs 5G brouhaha? Andy Ringsmuth (Jan 19)
- Re: What do you think about this airline vs 5G brouhaha? Scott McGrath (Jan 19)