How do ambient and radiant temperatures affect the performance of my base station? I'm in central Florida, and my base station was cooking for about 5 hours yesterday while setup on white gravel. Is it sometimes necessary to shade a base station to keep it cool?
Umbrellas go over totals stations not GNSS Rx’s- I’m not sure it’s that big of a problem. But that being said, I’m be interested in seeing what the folks in hot climates have say. There are some pretty innovative folks on here.
I wouldn't expect the receiver itself to have trouble in normal temps (up to, say, 110°F). The problems I hear about pertain to the base radio -- a 35W transmitter running at full power generates plenty of heat on its own, and can overheat when exposed to direct sunlight on a hot day.
And an onboard radio will probably be only 5W at best - so that's unlikely make much difference
First you find a 7'-5" derelict. Train him how to stand such that his shadow protects the critical area throughout the day. Provide plenty of water for daytime use and two special bottles for nighttime use. Shade and theft protection for one low price.
Anything you might set up to shade the base would also block the signals.
The problem with heat is you are not going to know if its a problem until its too late and something gets cooked. Put a meat thermometer on the legs with the sensor on top of the antenna. Call your service rep and ask if that temp is okay. My Stonex S850A is designed to operate in temperatures from -40°C to 65°C (-40°F to 149°F).
Real canopies, like the kind shading pumpkin sales at Halloween, have no effect on GPS signals.
Setup on white gravel? Highly unlikely the temp got anywhere near problematic.
GPS has been around for ~ 40 years. People in central Florida have been using GPS/GNSS for that long. Seems if it was a problem it would be well known.
All electronics have usable temp ranges. It's unlikely they are exceeded short of a really hot day with a black covered receiver sitting on black asphalt under direct sunshine.
Got a separate receiver and antenna and it's hot? Why not shade the receiver? It certainly doesn't hurt. Got a receiver antenna combo? You could shade it with transparent GNSS signal material, but really why? Again in most cases the operating temp is unlikely to be exceeded.
If anyone has anything near a normal case use where heat was a problem I'd love to hear about it.
As others have said, I doubt you will ever hit the maximum operating temperature of your receiver. Just looking over a couple of data sheets, both the Trimble R10 and Leica GS18i's operating temperature max out at 65C (149F). An external radio is a different issue. Looking at Satel's Satelline 4Pro, 60C seems to be the limit but the system will reduce power output as the temperature increases. It is definitely worth shading the radio, just make sure it gets plenty of airflow.
I have used a GS16 under the blistering sun of Blyth, CA in temperatures over 50C with no issue. I have a friend that had a TrimMark III burn up in the heat of southern Oregon.
On my old Trimble 4000 I hit the maximum temperature for the display one time, but I shaded the receiver and it came back. The session processed okay. After that I started putting it in a tub laid sideways to shade it on hot days while leaving the display visible.
I also hit my max operating temperature that day and was using a wet towel to survive.
Discovered a 7'-4" fellow last night playing basketball for the San Antonio Spurs. With a cap on his head he would be even taller than I suggested, but, he is most definitely NOT a derelict with nothing better to do.
Years ago in Yuma, AZ, my Trimble base station receiver was constantly overheating. To solve that problem, I improvised a fix using a lunch cooler lined with bags of ice at the bottom. I then fabricated a steel rack inside the cooler to suspend the receiver above the ice, allowing it to stay cool without direct sun contact. I closed the cooler with the cables routed out through the lid, even when the bags of ice melted the water stayed in the bags so nothing got wet, and from that point on I never had another overheating issue—even in desert temperatures exceeding 120°F.
Got the specs for my Carlson BRx7.
I'm skeptical the receiver will ever reach 149°F, but I'm going to check the temperature this summer just out of curiosity. I wonder why solar radiation (UV) is listed besides chemical resistance.
Thanks to everyone who participated in this discussion.
I wonder why solar radiation (UV) is listed besides chemical resistance.
Because UV radiation can destroy unprotected materials just like chemicals? Unfortunately for the wordl, it just breaks it down into smaller micro plastics.
@field-dog It depends on where you set it. The surface temperature of concrete or asphalt will hit 175 degrees in direct sunlight.
On hot sunny days I ensurethe radio is out of direct sun and well ventilated. That is on the rare occasion I use an external radio...