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How to Broadcast as a Base from the Leica GS14 Receiver

What do you do when you're out in the field using RTK GPS and you lose your network connection? With the new Leica GS14 GNSS, you can keep on working. That's because the GS14 now incorporates the most advanced modem/radio technologies to provide even better transmit and receive capabilities, allowing you to broadcast as a base from the receiver itself for a cable-free setup. Watch this video to learn how. 

Transcript:

This is a complete GS14 base rover kit. Inside this kit, we have our rod; our tripod; we have two GS14 antennas (both have internal GSM modems and one-watt UHF radios for receive or transmit; we have three spare batteries inside the box; the data collector with the bracket in order to hold it on the pole included; we’ve got antenna adapters; and we have any cables necessary for power included underneath the GS14s.

In the top box, we have tribrach; tribrach adapter; memory cards; battery for long-term use all day long (we can use the internal batteries for up to six hours); we have a height measure, so we can measure the HIs without having to take random measurements to the bottom – this will read directly from our tribrach adapter; we have our antennas; and we have any other additional pieces that will be needed based on other modems, different ways of attaching them, or backpack setups.

All right, now we’re going to take that GS14 system out to the field and do some work. To start with, we’re going to set up a network rover. We’re just going to use a single one of the GS14 antennas and connect to a GSM network and receive RTK corrections from an RTK network that’s available in the area.

For this, I need the data collector and one of the two antennas. Simply put the antenna on a pole like we normally would and power it up. The GPS receiver will start tracking automatically. We’re going to use a GSM connection available in the controller, in this case. We could, alternatively, use the one in the antenna, but we’ll use the one in the controller. We’re going to get a correction from the local network and then apply it here.

All right, we’ve connected everything. We’ve got our GPS up and running. Now you can see we're connected to a network. We’re receiving RTK, and we get a fixed solution. Now, what do we do when we lose our GPS network? Well, we’ll take a measurement on the network, and we’re going to set up our other GS14 here over this point as our base. So, in this case, finished, stored to point – we’re all done with this. We’d like to now set a base up over this exact same location and use this as a base point using just the other GS14.

Now we’ve set the tripod up over our point, set the tribrach up. We’ll level it up, put it up over the point. Now I’ll take the other GS14 receiver, put it on with the height hook so we can measure up our height. All we simply have to do is just turn on the receiver. We’re going to use the internal UHF radio that’s inside our GS14 now, while it’s a base, so it can transmit and receive. It doesn’t matter which one we pick. We’ll put our receiver up, mount the height hook on so we can measure our HI, pull our tape – then we’ve got a height. We’re going to measure it.

Once we’ve got everything set up over our base, we just need to attach all the UHF antennas to our systems to make sure we’ve got all the pieces installed. So, on both base and the rover, we’re going to attach a UHF antenna to extend the range of where we can go unit-to-unit. There’s two different antenna options on the base. We’re going to use [a] upturned antenna, make sure it doesn’t hit the tribrach or the tripod. Just snap it on. Then on the rover, we’re going to us a downturn, since we have plenty of space. In one case, one points up, one points down. We’re going to get the same range either way out of either one of the two radios.

Now, we’ll set up our collectors to be able to talk to both of these. Here we are, back on the controller. You can see it’s fixed based on the GSM connection we had a minute ago. Now I’m going to skate back to my instrument settings, go to my connections and actually go to the RTK rover setup where we were using the controller internet, and we’re just going to change this to using the GS radio. Here we use the internal radio. We’re still going to receive the same RTCM-3 connections, but now we’re going to turn off the network features and we’re going to make sure that we’re just using single baseline and no longer a network solution.

As soon as we set this up, you can see the arrow starts moving at the top... as soon as we say “Okay” because the base is up and broadcasting. You’ll see we go "Float", and we will "Fix" next. There’s an xRTK solution and then a full-phase fix, and we are ready to work. We’ve switched from GSM to UHF.