Followed the tutorial to make a DIY GNSS Reference station and it worked great for a few months. Stopped working and took it off the mount and it is full of water. Tried shaking it to try and see where the water got in, but the water isn't coming out

Fully recommended. An excellent antenna. Good value for money. It captures the signal of all the satellites available in the area. Currently I use it with an Emlid Reach M2 and I can compare its performance with other gnss that I have at work and this little antenna is capable of receiving the same amount of satellites as expensive antennas and expensive devices.

I purchased the GNSS Multi-Band L1/L2 Surveying Antenna (TNC) together with an RTK Express and mounted them both on a monopod. As soon as I connected the SW Maps app to an NTRIP station (MassCORS in this case) my errors dropped to .05m. Very cool. Make sure you get the little adaptor nut of you will be mounting it on a camera tripod or monopod.

I am making the world's first opal detector, I need absolute accuracy to pinpoint on a digital map for my clients to show them where they can go back to extract the opal. It is an excellent size for my detector. It is in the same size proportion as the rest of my detector. So it does not look out of place. It is easy to assemble and transport. I have not used it yet but if it does what you say it will I will be over the moon.

Good Morning, its and incredible product i love it!! 5 stars to GNSS Multi-Band L1/L2 Surveying Antenna (TNC) - TOP106!!!! thank you so much to the spark fun team!

I'm using it with a GPS-RTK-SMA (ZED-F9P) as a time and position reference. The only down-side I could find is that it's not registered in the IGS database so getting a reliable calibration is a little tricky. The L1/L2 phase offsets are in the datasheet (L1: 43.60, L2: 39.60) however so I was able to scan the ANTEX file from the NGS to find an antenna that has the same difference between the L1 and L2 offsets. The closest I could find was the HITINNO1 (Hi-Target maybe?) so I used that and adjusted my ARP height to account for the difference. It's not exact but it's close enough for my purposes.

Oh, if you're going to use this antenna in a fixed location, I'd suggest making a cable (RG-58 or better) with a TNC connector to avoid the adapters.

EDIT 2022-10-15: I just noticed that the antenna's calibration data is now in the official databases as SFETOP106. YAY (and thanks)!

iTS WORKS PRETTY WELL SO FAR.WILL CONTINUE TO USE AND SEE HOW GOOD IT IS!

I am using two of these in conjunction with two F9Ps for a GNSS setup. I am looking at an uncorrected accuracy of <0.08m in both Lat and Long with a very clear view of the sky while moving. I also use the second F9P for a moving base heading calculation, and while the heading isn't given for every RTCM series correction sent, it is reliable for enough of them that I can trust it for navigation. Overally, this antenna is fantasic.

This antenna is doing the same job as the brand name $3,000 antenna for only 130 bucks. It's amazing and saved me a lot of money! I'm saddened by the fact that it is now back ordered indefinitely on your website. Please bring it back!

Arrived quickly and well packaged. Just a few days US to New Zealand. Giving good performance in our timing application. Will continue to by from Sparkfun.

This antenna tracks our moving boat perfectly every time.

Most of our installations have been in Oregon. After a year they would stop working so we opened it up and found that it was 1/2 full of water. They do an amazing of sealing but when the temperature changes it sucks water through the area between the mounting thread insert and the plastic body where it is pressed together. We drilled a small 1.5mm hole in the plastic next to the brass threads to keep it from developing negative pressure inside. This seems to have worked. I would have probably given it a higher score if they had just answered my support request. We will keep using this.

I bought a couple of these to live outside, and since they are IP67 I figured I made the right choice! Well like others have said, water WILL eventually get inside and ruin them. It took about a year for the performance to drop to the point where I could only pick up 2-3 satellites reliably. Now I can hear water inside when I shake them. I'm giving them 3 stars because they do work, they're just not as weather resistant as the IP rating led me to believe. Going to try the SPK6618H next, hopefully those are more robust?

I've been unable to get an official survey of my property.

I've used this to get an unofficial survey of the water boundary, building area and electrical line and well site for my future home.

This gives me detailed information for my planning documents for permits, since there's offsets from all the locations required for septic systems in the area.

I just wish I could by two. Then I could do a pretty official property boundary based on the section corner in the neighboring lot.