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cyoung / stratux

Aviation weather and traffic receiver based on RTL-SDR.
BSD 3-Clause "New" or "Revised" License
1.07k stars 365 forks source link

Stratux GPS accuracy is very poor. #757

Closed capilee315 closed 6 years ago

capilee315 commented 6 years ago

  1. Stratux version: v1.4r5 (991f48eaa5)

  2. Stratux config:

    SDR

    • [ ] single
    • [X ] dual

    GPS

    • [X ] yes
    • [ ] no type: GPYes 2.0 u-blox 8 GPS unit

    AHRS

    • [ X] yes
    • [ ] no

    power source: External Battery Pack Pocket Juice Endurance 3X

    usb cable:

  3. EFB app and version: Foreflight 10.4.3

    EFB platform: iOS 12.0.1

    EFB hardware: iPad Mini (Lastest Version) it doesn't have Cellular function in the iPad.

  4. Description of your issue:

Greetings! I recently purchased Stratux. I tried to get the GPS to work. However, the GPS accuracy in Foreflight shows 93 Meters. I thought it could be the image issue, so I re-imaged the SD card and still it shows poor GPS accuracy. Should I purchase new GPS chip or should I re-image the SD card and try it again? Thank you for your help.

audiododd commented 6 years ago

Do you have this in a plastic case? Are you testing in your aircraft or another location? A friend had another brand of GPS chip in a metal enclosure and had bad luck.

I use the VK-162 external GPS dongle and almost always get 10m or less accuracy if I give it a good view of the sky.

capilee315 commented 6 years ago

Do you have this in a plastic case? Are you testing in your aircraft or another location? A friend had another brand of GPS chip in a metal enclosure and had bad luck.

I use the VK-162 external GPS dongle and almost always get 10m or less accuracy if I give it a good view of the sky.

Thanks for the reply. I have it in a plastic case. Only thing that is between the GPS reciever is the plastic cover. I'm testing it outside of my house. Do you think, should I change it to VK-162 external?

ninelima commented 6 years ago

I had a similar problems on 2 occasions.

The GPS was not properly plugged into the USB port. I think it had vibrated out or the unit got bumped. It was as simple as that;

The second time was dud/inetrmittent GPS receiver

------ Original Message ------ From: "capilee315" notifications@github.com To: "cyoung/stratux" stratux@noreply.github.com Cc: "Subscribed" subscribed@noreply.github.com Sent: 2018-10-26 11:08:10 Subject: [cyoung/stratux] Stratux GPS accuracy is very poor. (#757)

Stratux version: v1.4r5 (991f48e https://github.com/cyoung/stratux/commit/991f48eaa57c5701a7743c8d6d6f2e41cf4a3382)

Stratux config:

SDR

single[X ] dual GPS

[X ] yes no type: GPYes 2.0 u-blox 8 GPS unit AHRS

[ X] yes no power source: External Battery Pack Pocket Juice Endurance 3X

usb cable:

EFB app and version: Foreflight 10.4.3

EFB platform: iOS 12.0.1

EFB hardware: iPad Mini (Lastest Version)

Description of your issue:

Greetings! I recently purchased Stratux. I tried to get the GPS to work. However, the GPS accuracy in Foreflight shows 93 Meters. I thought it could be the image issue, so I re-imaged the SD card and still it shows poor GPS accuracy. Should I purchase new GPS chip or should I re-image the SD card and try it again? Thank you for your help.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/cyoung/stratux/issues/757, or mute the thread https://github.com/notifications/unsubscribe-auth/ARGTARHgTWYiQLUtvY6AxR8lG8eDrC_tks5uonyagaJpZM4X7dC0.

capilee315 commented 6 years ago

I had a similar problems on 2 occasions. The GPS was not properly plugged into the USB port. I think it had vibrated out or the unit got bumped. It was as simple as that; The second time was dud/inetrmittent GPS receiver … ------ Original Message ------ From: "capilee315" notifications@github.com To: "cyoung/stratux" stratux@noreply.github.com Cc: "Subscribed" subscribed@noreply.github.com Sent: 2018-10-26 11:08:10 Subject: [cyoung/stratux] Stratux GPS accuracy is very poor. (#757) Stratux version: v1.4r5 (991f48e <991f48e>) Stratux config: SDR single[X ] dual GPS [X ] yes no type: GPYes 2.0 u-blox 8 GPS unit AHRS [ X] yes no power source: External Battery Pack Pocket Juice Endurance 3X usb cable: EFB app and version: Foreflight 10.4.3 EFB platform: iOS 12.0.1 EFB hardware: iPad Mini (Lastest Version) Description of your issue: Greetings! I recently purchased Stratux. I tried to get the GPS to work. However, the GPS accuracy in Foreflight shows 93 Meters. I thought it could be the image issue, so I re-imaged the SD card and still it shows poor GPS accuracy. Should I purchase new GPS chip or should I re-image the SD card and try it again? Thank you for your help. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#757>, or mute the thread https://github.com/notifications/unsubscribe-auth/ARGTARHgTWYiQLUtvY6AxR8lG8eDrC_tks5uonyagaJpZM4X7dC0.

I disarmed the Stratux and tried to see what could interfere with the GPS antennae.. Still nothing.. I wonder if is just my GPS reciever is faulty... Should I just ask to Stratux guys about the issue?

lalalandrus commented 6 years ago

The pi and the SDR radios are extremely noisy and easily overpowers the weak GPS signal. My reception was extremely poor until I unplugged the SDR receivers or extended the GPS far away from the unit. I suggest looking on websites like thingiverse to see what others have implemented for their shielding.

I ended up using a metal case for my shielding https://www.reddit.com/r/stratux/comments/9ubvi7/pi_zero_w_in_metal_case/

cyoung commented 6 years ago

Newer UAT radio is less noisy and helps out a bit.

The receiver does sound bad, send a note to the vendor @capilee315.