Tests with the RhinoEdge tracking devices have shown that rhino horn material blocks the GPS signal significantly. This means even with perfect antenna tuning, getting low power results from any GPS sensor inside a rhino horn is extremely difficult. However, with the adequate tuning and specific placement of each type of RhinoEdge tracker, a stable performance can be accomplished.
We conclude that the less horn material is between the GPS antenna and the satellites in the sky, the better the GPS performance. Therefore, we strongly advice and promote the top-loading method, as this method outperforms the side-loading method. The RhinoEdge Cube and RhinoEdge Puck 34 are designed for the top-loading method. We strongly advice against using the side-loading method with these devices. The RhinoEdge Puck 50 can be deployed using the top-loading and side-loading method, as the antenna surface of this device is significantly larger than the Cube and Puck 34.
For all tracker methods, the exact placement is critical in order to safeguard the performance of the RhinoEdge devices. Therefore, the deployment of the devices should be performed according to the prescribed methods in this document to get a positive result. These methods include the use of specific tools and filament materials.
Internal linear GNSS antenna – tuned to this exact deployment method!
2 batteries – 4200mAh
High-power GPS: This device has two large batteries, therefore the high-power GPS can be used on a higher interval than the RhinoEdge Cube and RhinoEdge Puck 34. With a 1 hour GPS interval, an average time-to-fix of 30 seconds and a status message interval of 60 minutes, the estimated lifespan of the device is 2 years.
Low-power GPS: When using the side-loading method, the performance of the low-power GPS is not stable. In some cases, the low-power GPS performs, in other cases it does not resolve any GPS locations. Therefore, we advise against using the low-power GPS method when the RhinoEdge Puck 50 is side-loaded, as the main method for acquiring location data. However, when using the top-loading method, the performance of the low power GPS is stable and offers a very high interval of position updates. This allows for scenarios, where a low power position can be sent every 10 minutes, accompanied with a high-power GPS position every 12 hours for 2 years.
This device was initially designed for side-loading, however, if possible, the top-loading method increases the performance of the device. The top-loading method of the RhinoEdge Puck 50 is currently the only way to get the low power GPS in a stable and high-performance mode. We believe the RhinoEdge Puck 50 may also work well used as a "pod" on de-horned rhino. However, this still needs to be validated with results from actual deployments.
This device is performing good using the intended side-loading method, using a Forstner bit 50 mm. Using this method, the RhinoEdge Puck 50 is inserted into a 50 mm hole from the side surface of the horn. The RhinoEdge Puck 50 has an internal LoRaWAN antenna, therefore no additional hole needs to be drilled.
Go +/- 32 mm deep → going deeper will reduce the GNSS signal strength, because the signals have to travel trough more rhino horn material and Vettec Adhere.
Create a cavity inside the hole → this will ensure the Vettec Adhere can not escape the hole when solidified.
Put the RhinoEdge Puck 50 inside the hole
Make sure the GNSS antenna (ARROW POINTING UP on side of the device) is pointing towards the sky when the head of the rhino is in grazing position.
Apply the Vettec Adhere
Start pouring in the Vettec Adhere and fill up the 50 mm hole by pressing the mix tip as deep in as possible → pressing the mix tip inside the hole while pouring in the Vettec Adhere will ensure air bubbels are pushed out.
NOTE: the Vettec Adhere has a very fast set time of 30 seconds → once you start applying Vettec Adhere you need to commit to ensure there are no air bubbels
NOTE: the Vettec Adhere will fully cure less then 6 minutes
Cover the hole with painters tape
Cover the 50 mm hole with painters tape → this will ensure a smooth surface after the Vettec Adhere is solidified
Check the status of the device by scanning it with the Smart Parks Connect App
Check the device ID and write it down
This is probably the last time anyone will be near the rhino allowing it to connect to the device using the Smart Parks Connect app.
If possible take picture of the deployment for future reference.
It is very important to continue the reviewing of these deployments, placement of these device have show to be critical for performance.
the device is performing optimally using the top-loading method because the tracker is less blocked by horn material which affects the GPS signals significantly. Using a Forstner bit 34 mm, 2 holes need to be drilled to create a 50mm slot. The RhinoEdge Puck 50 is inserted into a 2 x 34mm hole from the top surface of the inside curve of the horn. The RhinoEdge Puck 50 has an internal LoRaWAN antenna, therefore no additional hole needs to be drilled.
Mark the location to drill the two overlapping 34 mm holes
Remember we need to be able to slide in the 22 x 48 mm puck as if it is a square → check the illustrations
Drill the two 34 mm holes
Start by drilling both holes only a couple of mm deep first → this will ensure the Forstner bit has enough grip on the horn once you start drilling the second hole.
Go +/- 58 mm deep → going deeper will reduce the GNSS signal strength, because the signals have to travel trough more rhino horn material and Vettec Adhere.
Create a cavity inside the hole → this will ensure the Vettec Adhere can not escape the hole when solidified.
Put the RhinoEdge Puck 50 inside the hole
Make sure the GNSS antenna (ARROW POINTING UP on side of the device) is pointing towards the sky when the head of the rhino is in grazing position.
Apply the Vettec Adhere
Start pouring in the Vettec Adhere and fill up the 50 mm hole by pressing the mix tip as deep in as possible → pressing the mix tip inside the hole while pouring in the Vettec Adhere will ensure air bubbels are pushed out.
NOTE: the Vettec Adhere has a very fast set time of 30 seconds → once you start applying Vettec Adhere you need to commit to ensure there are no air bubbels
NOTE: the Vettec Adhere will fully cure less then 6 minutes
Cover the hole with painters tape
Cover the 50 mm hole with painters tape → this will ensure a smooth surface after the Vettec Adhere is solidified
Check the status of the device by scanning it with the Smart Parks Connect App
Check the device ID and write it down
This is probably the last time anyone will be near the rhino allowing it to connect to the device using the Smart Parks Connect app.
If possible take picture of the deployment for future reference.
It is very important to continue the reviewing of these deployments, placement of these device have show to be critical for performance.
Go +/- 32 mm deep → going deeper will reduce the GNSS signal strength, because the signals have to travel trough more rhino horn material and Vettec Adhere.
Create a cavity inside the hole → this will ensure the Vettec Adhere can not escape the hole when solidified.
Put the RhinoEdge Puck 50 inside the hole
Make sure the GNSS antenna (ARROW POINTING UP on side of the device) is pointing towards the sky when the head of the rhino is in grazing position.
Apply the Vettec Adhere
Start pouring in the Vettec Adhere and fill up the 50 mm hole by pressing the mix tip as deep in as possible → pressing the mix tip inside the hole while pouring in the Vettec Adhere will ensure air bubbels are pushed out.
NOTE: the Vettec Adhere has a very fast set time of 30 seconds → once you start applying Vettec Adhere you need to commit to ensure there are no air bubbels
NOTE: the Vettec Adhere will fully cure less then 6 minutes
Cover the hole with painters tape
Cover the 50 mm hole with painters tape → this will ensure a smooth surface after the Vettec Adhere is solidified
Check the status of the device by scanning it with the Smart Parks Connect App
Check the device ID and write it down
This is probably the last time anyone will be near the rhino allowing it to connect to the device using the Smart Parks Connect app.
If possible take picture of the deployment for future reference.
It is very important to continue the reviewing of these deployments, placement of these device have show to be critical for performance.