How I can get grib files through VHF

[aquiles]

Hi, I'm new here. I search for a cheep method to recive grib fils with VHF radio if offline and than disply them on a Ubunto laptop in OpenCPN.
Greetings, Aquiles

[AA3JY]

Looking for Weather grib files via VHF?

[Sailmonkey]

First step is to get a hf receiver (SSB) radio, I’m not aware of any gribs broadcast on the vhf.

[Simi 60]

If you can get vhf reception surely you would be most likely getting mobile phone reception, so easy to use data for grib.

[GordMay]

Greetings and welcome aboard the CF, Aquiles.

[meirriba]

VHF radio cannot transfer files so grib files cannot be sent over VHF. On HF it can be done with the help of a special modem (Pactor).
If you have cellular connection you may get such files through the internet. Can be done also with satphone connected to a PC.

[aquiles]

I 've a HAM Radio with SSB. To learn on land I use on the laptop via Internet the Grib-viewer ZyGrib. It gets the weather data from NOAA-GFS server. But how is the situation without internet.

[wayne.b]

Originally Posted by aquiles

I 've a HAM Radio with SSB. To learn on land I use on the laptop via Internet the Grib-viewer ZyGrib. It gets the weather data from NOAA-GFS server. But how is the situation without internet.

===


To get GRIB files on your ham rig you'll need either a Pactor modem or special software to access Airmail/Winlink. There is a non-ham version of Airmail called Sailmail. Sailmail operates on marine SSB frequencies outside the ham bands and requires a yearly subscription fee. I use a Pactor on the ham bands and it works well subject to the vagaries of HF radio propagation.


The Airmail Home Page


https://sailmail.com


Pactor-II/III Radio Modem sales, FCC License filing, Marine SSB & HAM Radio Net schedules &amp frequencies.

[AA3JY]

Originally Posted by meirriba

VHF radio cannot transfer files so grib files cannot be sent over VHF.

Yes it can be accomplished using Winlink Express or Airmail packet mode on the dedicated RMS VHF freqs.

[Redline452]

Originally Posted by AA3JY

the dedicated RMS VHF freqs.

... which are in the Amateur VHF Bands, no? Not marine VHF according to the winlink website

[hzcruiser]

Originally Posted by meirriba

VHF radio cannot transfer files so grib files cannot be sent over VHF. On HF it can be done with the help of a special modem (Pactor).

What an interesting conjecture this is...



The only difference between VHF and HF is the frequency, it's not a different technology where one can do this but the other one can't. Pactor modems _can_ be used on VHF, but you are not allowed to actually use them on the marine frequencies. On the amateur radio bands they can be used, e.g. on 2m and 70cm, but that doesn't answer the OPs question.


So in short, I don't know anyone who is _broadcasting_ grib files on VHF, you'd have to go to HF and use the existing email services there as mentioned above by AA3JY.

[hzcruiser]

Originally Posted by Redline452

... which are in the Amateur VHF Bands, no? Not marine VHF according to the winlink website

Yes, but the OP didn't specify marine VHF, just VHF.

[Jim Cate]

Originally Posted by hzcruiser

Yes, but the OP didn't specify marine VHF, just VHF.

True, Heinz, but considering the fairly naive question and the way it was posed, does this sound like a ham to you? I reckon he meant marine VHF!

Jim

[hzcruiser]

Originally Posted by Jim Cate

True, Heinz, but considering the fairly naive question and the way it was posed, does this sound like a ham to you? I reckon he meant marine VHF!

Jim

He sure did, agreed. Nevertheless it might be an interesting idea similar to using channels 87B and 88B for AIS data at 9600 baud. Why not broadcasting local grib data for the coastal region through the existing repeaters? Maybe the market is too small for such devices as many regions have been covered by Navtex for decades, just not Oz.


P.S.: It seems you are migrating north again?

[belizesailor]

Originally Posted by Simi 60

If you can get vhf reception surely you would be most likely getting mobile phone reception, so easy to use data for grib.

And given that VHF range is only about 20 miles the practical application of sending data over VHF is quite limited (doable technically, but with limited practical benefit)