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SST Temp Charts from Sirius or XM Weather

Old 02-21-2010, 12:45 PM
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Default SST Temp Charts from Sirius or XM Weather

Does anyone have any screen shots of SST and/or chlorophyl charts taken from their MFDs while using Sirius or XM weather? Also, is the subscription price worth it?

Here on the west coast, we can access SST info from a pay service like http://www.fishdope.com/ or a free service like http://www.tempbreak.com/. I'm just wondering if having the information live on my boat's screen has any advantage to printing the information and taking it with me on the boat.
Thanks
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Old 02-21-2010, 01:50 PM
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you bring up a good point. I just bought satelite weather. Since sirrius bought out XM i think it would be the same but I'm not 100% on this. Ijust bought a furuno package and its sirrius weather so as far as furuno its sirrius. some of the features that you get with this is that you get instant weather trackin so if a tstorm is coming thru you can see it also it shows fronts wind conditions wave condition at each reporting buoy and sea surface water temperatures. So it will be interesting to see what others say as well espically since i just bought the package and have not used it. I will say that it does cost $50 dollars a month.
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Old 02-21-2010, 02:07 PM
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Originally Posted by middleofnowhere View Post
Does anyone have any screen shots of SST and/or chlorophyl charts taken from their MFDs while using Sirius or XM weather? Also, is the subscription price worth it?

Here on the west coast, we can access SST info from a pay service like http://www.fishdope.com/ or a free service like http://www.tempbreak.com/. I'm just wondering if having the information live on my boat's screen has any advantage to printing the information and taking it with me on the boat.
Thanks
I have Sirius, but so far I am very skeptical of its water temp accuracy. Usually, the indicated temperature is significantly over actual temps (based on my real-time on-site thermometer readings), but more importantly, even the breaks don't seem to be accurate. On the other hand, the weather info (not forecast, but actual) does seem to be accurate. In particular, the wind and lightning both seem to be very accurate in comparison to actual conditions, and barometric pressure is pretty close.
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Old 02-21-2010, 02:15 PM
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I have the XM weather. I love all of it except one display, the SST. There are something like 7 different displays and all work really well except the SST. The Sirrius SST is much better, it uses a higher resolution image for the SST display somehow, or the data is betterm, I haven't figured out which.

The problem with the XM SST is the resolution of the image. The temps seem to be all there, if you click anywhere on the display, the temp is displayed and it varries with each click, yet he color is smoothed out so much on the image you can't tell.

I mentioned this to both Garmin (my XM display vendor), and the XM weather folks both at the Miami show. BOTH interrupted me mid sentance and said "Yes, we know, we know the XM weather isn't that good yet...." (I paraphrase obviously). Adn both said they were working on something for the future but would not give any details or any dates. BUT, the XM folks did say something to the affect that since the merger between serrius and XM, they were working on making the XM weather look more like the sirrius wx. And one of the reps said it is goign to happen this year, pretty quicky. But who the heck knows...... it tough to get anythibng out of them.

That said, the subscription price is WELL worth it, for the other features alone (live radar, sea surface conditons, storm tracking, predictions...

EDIT: After just reading mytravelers post, I can say the XM water temps I find to be pretty accurate. When at the canyons this past year, it was pretty close to being dead on most of the time.
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Old 02-21-2010, 02:19 PM
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birdman i don't understand. Sirrius definatly bought XM so whay can't or don't receive Sirrius?
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Old 02-21-2010, 02:22 PM
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They are still separate services (different sat, different receiver hardware). So my Garmin XM receiver still only receives XM.
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Old 02-21-2010, 05:02 PM
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Hmm you think you could
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Old 02-22-2010, 04:44 AM
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I agree with Birdman. I have Sirius wx on my Raymarine C80. On the closer ranges the display is pixilated a bit. This is probably due to the 8 inch display and resolution. I use it for watching weather which I love it for. Still a great tool IMO.

I want to say the weather only price is somewhere around $30/month. If you add the radio it is somewhere around $50, not 100% sure.
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Old 02-22-2010, 07:19 AM
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I pay for the full blown captains package, which I think is $50 a mounth, but can be suspended when not in use (winter). Well worth it!!
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Old 02-22-2010, 07:29 AM
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I have the master mariner service as well, and HATE the XM sst portion of the service. There are a few features that are just a waste of bandwith - fog predictions, fish predictions, and sst. They are worse than worthless because they take bandwidth away from the useful features.

I've seen people using the serius sst package, and it is better, but not enough to go out and buy it just for sst. The people who get value from it are out on the water every single day and already have unlimited services to either roffers or oss. They use the serius sst shots as a way of tracking the waters movement, not it's exact location.

For guys like me that go out far enough to need it once a week max, it wouldn't help. The services are much better.

Now if they could be used to download and display pdf files with accurate charts, that would be useful. For that though, I'd need my sat phone connected to my laptop and a whole bunch of minutes to burn. It might still be worth it.

But in cases like that, I can just call len up at oss and ask hime where the water went.
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Old 02-22-2010, 09:01 AM
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"Fog prediction"? I don't remember seeing that...?

But I like the fish predictions, I think that works pretty well. It basically finds the best temp area for the fish your looking for, and I find it very accurate. By accurate I mean, it cross hatches the area's I would have targeted on the map myself.

One thing to understand, and XM and Garmin confirmed this to me. The SST dsiplay has very good resolution "internally". By that I mean, every spot on the display has it's own temperature, at a pretty high resoltuion. Where the problems is, is the display of the colors / image of those temperatures. Garmin admits to smoothing it out too much, and XM admits to not formating it in the best way possible for Garmin to handle. And that is the part they (XM reps) were telling me is going to change "soon".

But that is why when you click on the display, you get good detail of temps (each spot is different), even though the picture displayed / color chart might show it all the same color (yellowish for example).

To me the info is very useful, MUCH better than not having anything at all. But it needs imporved big time to make it better.
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Old 02-22-2010, 09:36 AM
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Originally Posted by Birdman View Post
"Fog prediction"? I don't remember seeing that...?

But I like the fish predictions, I think that works pretty well. It basically finds the best temp area for the fish your looking for, and I find it very accurate. By accurate I mean, it cross hatches the area's I would have targeted on the map myself.

One thing to understand, and XM and Garmin confirmed this to me. The SST dsiplay has very good resolution "internally". By that I mean, every spot on the display has it's own temperature, at a pretty high resoltuion. Where the problems is, is the display of the colors / image of those temperatures. Garmin admits to smoothing it out too much, and XM admits to not formating it in the best way possible for Garmin to handle. And that is the part they (XM reps) were telling me is going to change "soon".

But that is why when you click on the display, you get good detail of temps (each spot is different), even though the picture displayed / color chart might show it all the same color (yellowish for example).

To me the info is very useful, MUCH better than not having anything at all. But it needs imporved big time to make it better.
Yeah, and I have a bridge in brooklyn to sell you.

The data itself is garbage. They have a lot of it internally, I'll grant that, but it is not actual sat temp imagery calibrated to known geographical reference points.

It's interpolated data based on much cruder data samples and averaged over a large area. It's all very mathematical, and all very wrong.

How else do they have temp data when storms have blacked out the professional services and even rutgers for a solid week? They don't have real data. They have guesses. And guesses made from bad data ain't worth a darn when you are floating around 100 miles from port and looking for a break that could be 20 miles from where the chart might show it if it shows anything at all.

Sorry XM, you don't get any credit for bad data, and there is nothing Garmin can do to fix it.
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Old 02-23-2010, 12:21 PM
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Oh, "Fog predictions", think you meant the "Visibility" display.... gotcha.

Regarding temps: Well, I don't rely on it at all, and the few times I get out there a season it's on nice clear days, and ussually had been clear for a few days, so I'm sure the data is fairly accurate when I'm out there. When I have compared my live reading to what the XM is sayng it should be, they have been dead on so far.

I do get what your saying though..., and would imagine it's not always dead on. NBUT, it's still better than my old method of: "hmmmm.,,,,, where do you guys think the warm water is today?"
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Old 02-23-2010, 12:33 PM
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Default Cloud Free Blended SST Charts Info

Most of the services are using this technique. It lets them see a picture thru cloud cover.

This is the explanation from Terrafin.

http://www.terrafin.com/sstview/cloudfreehelp.php

http://www.terrafin.com/sstview/browse.php?ct=sst

I am not afilliated with Terrafin in any capacity ...... I do use their pay for view services. I'm posting this as general information.

Good information.

Update Frequency - We update the Cloud Free SST charts daily. NASA processes the data each day for the previous day, so the charts will always be one day behind.

Understanding the data - The Cloud Free Blended SST data is derived from a combination of data from different sources. Some of the data sources include satellite Microwave data with a resolution of 25km., GOES (Geostationary Environmental Satellite) data with a resolution of 6km., along with MODIS and AVHRR data with a resolution of 1.1km. The microwave data is not affected by cloud cover, but as you can see is very low resolution. The MODIS and AVHRR data are the highest resolution, this is the data that we use for our standard SST and Chlorophyll charts. This data is blocked by cloud cover, as our subscribers are all too aware. The goal is that by combining the cloud free microwave data with higher resolution data from other source, a reasonably accurate estimate of the SST's can be produced on a daily basis.
Realize the Limitations - At first glance this may sound like the answer to all of our problems with cloud cover, but it's not. This is just another tool to give us some information during the cloudy periods, but it is important to recognise the limitations. The microwave sst data is the only data that actually works through the clouds. This is the lowest resolution, 25k data. 25km resolution means that there is one temperature value for an area 25km by 25km, that's over 600 square kilometers of water. While this is fine for getting the big picture, it's not going to show you the smaller edges that we look for, and the actual location of the breaks shown can be off by 10 miles or more. When we do get more clearing, the "Blended SST" data will incorporate more accurate data from the higher resolution satellite sources. During these periods the overall image accuracy should be better. Incorporating the higher res data definitely improves on this, but it might also show some "edges" that are actually due to the blending of the data, instead of the actual water. When we have reasonably clear skies, you will almost always get more accurate data from our standard SST and Chlorophyll charts. But, when the clouds take over this should be a useful alternative to at least have a rough picture of what's happening out there.
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Old 02-24-2010, 12:16 PM
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Originally Posted by middleofnowhere View Post
Does anyone have any screen shots of SST and/or chlorophyl charts taken from their MFDs while using Sirius or XM weather? Also, is the subscription price worth it?
There is a pix of my Vx2 in this old thread. Im sorry but dont know how to post here directly. http://www.thehulltruth.com/sportfis...uk-yellow.html

I think its worth it for the combination of the weather and temp charts. I have been on the edge and been able to dodge storms or even better know when it makes sense not to run home right into them.

I use terrafin in the days prior and then sirius helps the day of.
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Old 03-03-2010, 05:50 AM
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Originally Posted by rcatena View Post
There is a pix of my Vx2 in this old thread. Im sorry but dont know how to post here directly. http://www.thehulltruth.com/sportfis...uk-yellow.html

I think its worth it for the combination of the weather and temp charts. I have been on the edge and been able to dodge storms or even better know when it makes sense not to run home right into them.

I use terrafin in the days prior and then sirius helps the day of.
Thank you for the link and screen shot. Great fish report too.

Last edited by middleofnowhere; 03-03-2010 at 06:01 AM. Reason: add
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Old 03-04-2010, 06:20 AM
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I have the Sirius thing. What I do is look at the free Rutgers site, if I am wondering about cloud cover issues. This will let you know if a sat pic is even available. Rutgers posts low res pics even when they are clouded out almost completely. This allows me to decide wether the Sirius pic is recent and worth anything.
I think the Sirius storm and weather display is probably more worth it than the SST. Even with radar on the boat, the weather function is superior in helping you make smart storm judgments. The supposed high res Sirrius SST is not as high of resolution as I thought it would be. I have a Furuno VX2. I consider the SST part of this service as Ok but not great. The weather part great. Without the weather part of the Sirrius service, it would definatly not be worth it. I bought it for the SST. Luckily the weather service was unexpectedly so nice, or I would have been disgusted.
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Old 03-04-2010, 06:26 AM
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The weather (NEXRAD) imagery is why I pay the fee for the service. I guess I could drop down from the master mariner to a cheaper plan and still get that, but the buoy data and wind/wave projections are useful as well and it's not that much more in the big picture.

But for XM at least, the SST data is garbage. I pay for an unlimited OSS plan, so I'm not exactly taking the cheap way out either, but given the price of fuel and everyones time, I'd rather come back with fish. XM just doesn't help there.

It is absolutely worth it for the real time NEXRAD imagery and storm tracking though. To be able to see a line of heavy t-storm squalls coming in from western nj/pa/ny and then cross the sound and head directly for me east of block island is worth every penny.

I'm usually running for mommy long before the NWS issues it's warnings.
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