Base gps options

[Nate The Surveyor]

I have a friend asking me the following questions.
Would it be better for me to buy the t1, or t1M, as base, because it can track the other constelations?
Will dpos work with the other constelations?
If I get the t1M, as base, how good is it's range? Without external radio?
If I opt to get the t1M, as base, will it improve my solution? (Naturally, I think more sats is better) how much?
If I opt to get the t1M, as base, will it track and use in the solution every satellite up there?
And, how does a radio work with the t1M? Does it have a wire, base to radio?
Does t1M support beast mode?
And, can you set the t1M up, running in beast mode, and set the radio up 1/2 mile away, in beast mode, using the external radio in beast mode?
Or, is another option for the base, that supports all constelations?
Can we put an external battery on the t1M, for better battery life, in beast mode.

Somebody tell us what we need to know. Anything, and everything we need to know, to decide what to buy as base.

Thank you
N

 

[Matt Johnson]

There currently aren't enough satellites broadcasting L5 for it to be useful but eventually there will be. I wouldn't expect to see any difference in the solutions until this time.

The T1-M has a 1 watt internal radio, an external radio can also be used with it. No wires need to be connected but an external power supply (battery) could be used with it. The other option for a base might a 2nd LS.

The biggest limiting factor for radio range is the terrain. In a flat countryside environment a 1 watt radio can have a usable range of about 1 mile at 2 meters high and 2.5 miles at 4 meters with 5 hz corrections. If there is not a clear line of sight between the base and rover and there are terrain obstructions, the range will be much less.

 

[Wes Cole]

I have the T1M, had it about 3 weeks. I got it with the frequency hopping spread spectrum 1 watt radio. I work in mountainous terrain and haven't had the chance to really test it's range yet. However on a project last week I was probably 3/4 of a mile from the base and up and over a very large hill. Still had strong signal and 5hz. Between the 1watt, TCP, and hybrid RTK the external 35 watt radio may not be necessary, depending on the areas your friend works in. The sweet thing about the FHSS radio is there's no need for an FCC license. Also with the internal radio there's not another piece of equipment to keep up with, charge batteries, etc.

 

[Robert P Stenerson]

If your friend is on budget, you might want to suggest getting a used, T1. Install a new set of batteries, upgrade it's firmware and UHF to latest versions, and with it's no muss no fuss form factor he could rock Beast mode at 1-watt. Before we got our T2, we were using our five year old T-1 (in the background of profile photo) as our base for the LS with beast mode. I can't say though if it would be compatible with all the new J-Field V2.

The nice thing about a T-1, it also runs on Carlson SurvCE 2.5 and newer!

 

[Nate The Surveyor]

Does the FHSS Radio, in the T1M, carry corrections to the 35 watt radio, with this arrangement?
Or, is it Bluetooth?
At what point will the newer sats, with L5C make a difference?
When I bought mine, (I got t2) I was told it was at least 8 mos. Away.
I did this, because I can't see being without a 35 watt radio.

If I got the t1M, would I realize ANY benefit from other constellations now?

Seeing is believing, and in rtk GPS, this is very true, for most people.
N

 

[Nate The Surveyor]

He is on Carlson right now.
So, another possible option could be LS on base, and t1M, with carlson on rover. Then, when his pressure is off, learn the LS.

 

[toivo1037]

At what point will the newer sats, with L5C make a difference?
N

Galileo will be useful before L5C. It is just about there in the US, but another 2 sats next week, 4 more this fall, and 4 more 2017 Q3 it will be very helpful.

 

[Darren Clemons]

Does the FHSS Radio, in the T1M, carry corrections to the 35 watt radio, with this arrangement?
Or, is it Bluetooth?
At what point will the newer sats, with L5C make a difference?
When I bought mine, (I got t2) I was told it was at least 8 mos. Away.
I did this, because I can't see being without a 35 watt radio.

If I got the t1M, would I realize ANY benefit from other constellations now?

Seeing is believing, and in rtk GPS, this is very true, for most people.
N

Nate, we have the t1m, an HPT435BT radio and the LS. As Matt said the internal 1w is all about terrain. I've done entire 100 acres farms with it, but it was flat as can be. I've also set up the 35w on a 7 acre site where it dropped straight off 150' in elevation. The 35w connects via Bluetooth and it is a snap to set up and switch between the 1w and 35w. When starting everyday the LS, when in uhf configuration "identifies radio" and if the 35w is on the LS picks it up. If it's not, it, of course picks up the internal 1m. If you use the 1w two or three jobs in a row there's no need to change anything or do a "to base". Only when you change radios do you have to change some settings.
As far as any benefit from other constellations now, I doubt there is much difference in the t1 and the 1m but If Galileo and L5 come into play soon, there definitely will be.

 

[Nate The Surveyor]

Darren, I like your pic, in your avatar! I can sure relate!

 

[Robert P Stenerson]

He is on Carlson right now.
So, another possible option could be LS on base, and t1M, with carlson on rover. Then, when his pressure is off, learn the LS.

Might want to check w Michael G. about that, even though they look similar, a T1 and T1M are different under the hood, so T1M and LS may not play under SurvCE.

 

[toivo1037]

T-1M is the most current. I think it has the same board as the LS, and Javad does offer it as a base. That is why I felt comfortable going with a pair of T-1Ms, I feel that I was getting a more conventional setup, allowing me to use my DC with Carlson, but the hardware is the latest out there.