Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 02-12-2014, 03:12   #1
Registered User

Join Date: Jan 2013
Location: Seward, AK
Boat: Rawson 30 PH
Posts: 126
20$ AIS

https://translate.google.com/transla...r-for-opencpn/

Obviously not ready to make into a primary system, but my imagination is running wild with sdr options!
1.AIS
2. WEFAX
3. Actual NOAA images and data from satellites
4.???

And portable too. Looking to integrate into my samsung galaxy tab 3 which already has onboard GPS. Once I root and get OPENCPN running, i will have a full 3rd redundancy for e-navigation. Loss of all power could be worked around by keeping an isolated back-up battery, simmilar to those found in UPS backups(small agm battery). Which coupled to even a small solar panel could run a really long time, if not for the remaining duration of the trip.
__________________

__________________
joel383 is offline   Reply With Quote
Old 02-12-2014, 05:52   #2
Registered User

Join Date: Jul 2014
Location: Daphne Alabama
Boat: Bristol 35
Posts: 399
Re: 20$ AIS

That looks very interesting. I'm not much of a computer person but may try this here in Mobile Bay where we have lots of tanker traffic and see if I can get it to work. Thanks for the info!
__________________

__________________
biker6977 is offline   Reply With Quote
Old 02-12-2014, 09:29   #3
Registered User
 
HappySeagull's Avatar

Join Date: Dec 2010
Location: B.C.,Canada
Boat: 29'
Posts: 2,395
Re: 20$ AIS

Quote:
Originally Posted by biker6977 View Post
That looks very interesting. I'm not much of a computer person but may try this here in Mobile Bay where we have lots of tanker traffic and see if I can get it to work. Thanks for the info!
IMO, the "vertical polarized antenna adjusted to 162MHz" mentioned will be an important component....but you can try to tune an antenna from a plain jane FM radio or a coathanger...my results were not encouraging. The quality of the RTL Dongle I have is not great.
An old scanner or VHF radio works better for me.
__________________
HappySeagull is offline   Reply With Quote
Old 02-12-2014, 12:22   #4
Registered User

Join Date: Jul 2013
Location: Washington State, USA
Boat: 1983 Fu Hwa Seahorse
Posts: 86
Re: 20$ AIS

I do this technique on Raspberry Pi and Cubietruck platforms and it works great. No idea how (or even if) it would work on your tablet.

There is quite a bit of setup and tinkering to get it right, but once you do it is very effectve. Even using the cheap supplied antennae I get signals from over 20 miles away.

I have a splitter for my VHF radio now, but haven't hooked it up to the device as the connections don't match and I need an adapter. Yet another thing I want to work on this winter.
__________________
Thanks, Matt B.
1983 Fu Hwa Seahorse
http://mvcesc.wordpress.com/
mattkab is offline   Reply With Quote
Old 02-12-2014, 13:54   #5
֍֎֍֎֍֎֍֎֍֎

Cruisers Forum Supporter

Join Date: Apr 2006
Posts: 13,054
Re: 20$ AIS

SDR can be very interesting. And the antenna more important than you might think. Simply using a horizontally polarized antenna (i.e. something laying down flat instead of vertical) can cause a 20db signal loss compared to a the same plain vertical whip. That's about a 64x difference in signal strength. Splurging on an inexpensive "emergency" antenna and connecting that up to the SDR might be a good idea, if you've no taste for making one.
__________________
hellosailor is offline   Reply With Quote
Old 02-12-2014, 15:01   #6
Registered User

Join Date: Jan 2013
Location: Seward, AK
Boat: Rawson 30 PH
Posts: 126
Re: 20$ AIS

Im looking into a qfh antenna to recieve the circular polarity 137mhz noaa satellites. Making one rugged enough to take cruising on the boat is going to be a trick though.

Sent from my SM-T210R using Cruisers Sailing Forum mobile app
__________________
joel383 is offline   Reply With Quote
Old 02-12-2014, 17:17   #7
Registered User
 
boat_alexandra's Avatar

Join Date: Aug 2009
Location: chesapeake bay
Boat: bristol 27
Posts: 2,810
Re: 20$ AIS

I have seen someone with a double helix antenna for satellite imagery
__________________
boat_alexandra is online now   Reply With Quote
Old 02-12-2014, 19:07   #8
Registered User

Join Date: Jan 2013
Location: Seward, AK
Boat: Rawson 30 PH
Posts: 126
Re: 20$ AIS

Quote:
Originally Posted by boat_alexandra View Post
I have seen someone with a double helix antenna for satellite imagery
That was probably a quadrifilar helical antenna, looks very similar to a double helix
__________________

__________________
joel383 is offline   Reply With Quote
Reply

Tags
ais

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
AIS AIT2000 from Digital Yachts with GV30 GPS+AIS Antenna SFH Marine Electronics 1 16-02-2014 17:19
For Sale: AIS-MULTI AIS Receiver with built in Antenna Splitter kokomodenny Classifieds Archive 1 17-09-2013 09:53
For Sale: Standard Horizon Matrix AIS+ GX 2150 VHF Radio/AIS Receiver with CMP30 Ram3 Second St westsailwill Classifieds Archive 6 23-04-2013 19:21
AIS Simulation - Run VDR to play AIS Nmea file rgleason OpenCPN 16 12-01-2013 11:28
Can You Get Radar & AIS Overlay on Laptop ? AIS Transceiver Recommendations ? lunasea.ds Marine Electronics 22 27-12-2010 14:06



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:39.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.