Tracker

From APRSWiki
(Difference between revisions)
Jump to: navigation, search
m (Tracker Tracking moved to Tracker: Improper migration of wiki content.)
(Fix formatting and remove wikka-wakka specific markup.)
Line 1: Line 1:
 
====Tracker====
 
====Tracker====
  
A tracker is a type of  [[APRSStation APRS station]].
+
A tracker is a type of  [[AprsStation|APRS station]].
 
The intent of a tracker is to transmit position reports.  To do this a transmitter,
 
The intent of a tracker is to transmit position reports.  To do this a transmitter,
 
TNC and GPS are required.  Technically you don't have to have the GPS if there
 
TNC and GPS are required.  Technically you don't have to have the GPS if there
Line 13: Line 13:
  
 
Every APRS transmitting station, trackers included, has to have a unique identification, usually  
 
Every APRS transmitting station, trackers included, has to have a unique identification, usually  
a callsign-SSID pair. The tracker should use an identification [[CallSign callsign]] of the licensed
+
a callsign-SSID pair. The tracker should use an identification [[CallSign|callsign]] of the licensed
 
radio operator acting as the control operator.
 
radio operator acting as the control operator.
  
 
Notice that no receiver is required.  This means that trackers blindly transmit,
 
Notice that no receiver is required.  This means that trackers blindly transmit,
and cannot serve as [[Digipeater digipeaters]], [[IGate I-Gates]] or other more  
+
and cannot serve as [[Digipeater|digipeaters]], [[IGate|I-Gates]] or other more  
 
sophisticated roles.  But stations with receivers can perform a tracking function
 
sophisticated roles.  But stations with receivers can perform a tracking function
along with other [[StationRole roles]].  Blind transmitting means that the tracker
+
along with other [[StationRole|roles]].  Blind transmitting means that the tracker
 
needs to be configured in such a way as to avoid unnecessary interference.
 
needs to be configured in such a way as to avoid unnecessary interference.
 
So trackers are usually low power, 5-watts or less output, and  the interval
 
So trackers are usually low power, 5-watts or less output, and  the interval
Line 30: Line 30:
 
the tracker with a computer connection before it is put into service, then the only control might
 
the tracker with a computer connection before it is put into service, then the only control might
 
be an on/off switch.
 
be an on/off switch.
 
  
 
===Legal Implications?===
 
===Legal Implications?===

Revision as of 16:22, 13 August 2007

Tracker

A tracker is a type of APRS station. The intent of a tracker is to transmit position reports. To do this a transmitter, TNC and GPS are required. Technically you don't have to have the GPS if there is some other way to obtain position information (like typing it in or selecting it from a map display), but having a GPS makes things automatic.

Trackers can be attached to a vehicle, a person, a balloon, or anything that moves around.

Using a map display along with a receiver (or the APRS-IS internet system) the accumulation of position reports appears as a //track// on a map.

Every APRS transmitting station, trackers included, has to have a unique identification, usually a callsign-SSID pair. The tracker should use an identification callsign of the licensed radio operator acting as the control operator.

Notice that no receiver is required. This means that trackers blindly transmit, and cannot serve as digipeaters, I-Gates or other more sophisticated roles. But stations with receivers can perform a tracking function along with other roles. Blind transmitting means that the tracker needs to be configured in such a way as to avoid unnecessary interference. So trackers are usually low power, 5-watts or less output, and the interval of position reports is the largest interval compatible with the goals of the tracker operator.

Trackers can be made to various degrees of sophistication. Some of them are smart enough to change the position report sending rate based on speed or directional changes. Trackers usually don't have much of a user interface. It is sometimes possible to program the tracker with a computer connection before it is put into service, then the only control might be an on/off switch.

Legal Implications?

A tracker is a radio transmitter so it has to be controlled by a licensed radio operator following the laws and regulations which apply in that jurisdiction.

In the USA, it is generally acceptable to have the tracker be //controlled// by a licensed operator, who could turn it off if it were to start causing interference. (**Don't take this as legal advice!**) The idea of control is not strictly defined. It may be that the tracker is not physically within grasp of the controlling operator, but that he or she can access it within a reasonable amount of time if intervention is required. Usually trackers are not configured for remote control via DTMF, telephone, or other methods as employed in the voice repeater realm.

Personal tools