Tags & Receivers system consists of two parts. The first is
a digital tag receiver mounted on a collar with a GPS device that
determines it’s position to within 5 meters. The second
part is the tags with unique ID numbers and temperature sensors.
The tags can be mounted onto animals by various means due to their
small size (e.g. collars or implants). At schedule reading times
the digital receiver records its exact GPS location as well as
the location (direction from unit) and distance (in terms of signal
strength) of each tag within range. The signal strength is only
to be used as a rough indicator of distance from the receiver
unit as the animal itself, as well as the environmental conditions
& surroundings can affect signal strength. The tags’
battery life is estimated to last approximately 3 years on one
penlight lithium battery.
data from each scheduled reading is then saved onto a Data Logger
that can store up to 20 000 readings. The data can be transferred
to the uses via GSM network (if the receiver is attached to a
Cellular collar) or via Satellite (if the receiver is mounted
on a Satellite collar) or stored on a Data Logger Radio Collar
and retrieved by locating the unit by means of radio tracking
and manually removing the collar after a specified time period.