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Author Topic: Ground Station  (Read 170171 times)

EricC

Re: Ground Station
« Reply #420 on: June 06, 2018, 12:00:30 pm »
Sorry finger trouble....RX=1138
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Ian Melville

Re: Ground Station
« Reply #421 on: June 06, 2018, 03:09:24 pm »
Checking we do read your posts :-)
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EricC

Re: Ground Station
« Reply #422 on: June 07, 2018, 08:54:37 pm »
P3i packets for today.

TX=27569    RX=980     CRC FAIL=6
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EricC

Re: Ground Station
« Reply #423 on: June 08, 2018, 08:15:12 pm »
P3i packets for today.

TX=26283     RX=74     CRC FAIL=0
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EricC

Re: Ground Station
« Reply #424 on: June 09, 2018, 08:48:47 pm »
P3i packets for today.

TX=27210      RX=2822      CRC FAIL=90

A new record for RX packets.     May I ask what " CRC FAIL"  actually means?
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brinzlee

Re: Ground Station
« Reply #425 on: June 09, 2018, 10:33:10 pm »
"The cyclic redundancy check (CRC) is a technique used to detect errors in digital data. CRC is a hash function that detects accidental changes to raw computer data commonly used in digital telecommunications networks and storage devices such as hard disk drives....."
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Ian Melville

Re: Ground Station
« Reply #426 on: June 09, 2018, 11:16:15 pm »
In English it means that one of the messages was not in the correct formator did not meet a quality check, so was discarded. Most likely it was corrupted by a another transmission 'Stepped on', or was to weak a signal.

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EricC

Re: Ground Station
« Reply #427 on: June 10, 2018, 08:49:52 am »

Thanks for the info regarding CRC check.

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Admin

Re: Ground Station
« Reply #428 on: June 10, 2018, 10:19:05 am »
Quote from: Ian Melville on June 09, 2018, 11:16:15 pm
In English it means that one of the messages was not in the correct formator did not meet a quality check, so was discarded. Most likely it was corrupted by a another transmission 'Stepped on', or was to weak a signal.

From analysis I have done previously, this is due to a weak signal, so it tends to happen as the Aircraft is on the edge of good reception.
thx
Lee
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exfirepro

Re: Ground Station
« Reply #429 on: June 10, 2018, 04:06:29 pm »
There you go Eric,

Just goes to show, people do read and take note of your posts.

Not that that was ever in doubt from the header....

Topic: Ground Station  (Read 52194 times)

Keep up the good work!

Regards

Peter

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EricC

Re: Ground Station
« Reply #430 on: June 10, 2018, 09:06:26 pm »
P3i packets for today.

TX=27860     RX=322     CRC FAIL=0

I guess most of the contacts yesterday came from aircraft landing on
the beach at Fleetwood/ Pilling Sands.





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exfirepro

Re: Ground Station
« Reply #431 on: June 10, 2018, 10:20:18 pm »
Good to know lots of them were running PilotAware Eric.

Best Regards

Peter
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EricC

Re: Ground Station
« Reply #432 on: June 16, 2018, 08:43:54 pm »
P3i packets today.

TX=25043     RX=735     CRC FAIL=51
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EricC

Re: Ground Station
« Reply #433 on: June 17, 2018, 08:32:06 pm »
P3i Packets toay.

TX=26742     RX=123       CRC FAIL=0
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EricC

Re: Ground Station
« Reply #434 on: June 19, 2018, 09:08:58 pm »
P3i packets for today.


TX=27880     RX=211      CRC FAIL=0
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