521993
44
Zoom out
Zoom in
Previous page
1/110
Next page
ComNav Vector G2/G2B Installation & Operation Operation
Document PN 29010078 V2.0 - 42 -
DRAFT #3 – 29 May 2009
Moving Base Station RTK
The technique of computing the location of the Secondary GPS antenna with respect to
the Primary antenna, when the Primary antenna is moving, is often referred to as Moving
Base Station Real-Time Kinematic (or as Moving-base-station RTK, or just RTK).
RTK technology is very sophisticated and requires a significant amount of real-time
computation – in essence “searching” for the correct solution, within a large number of
possible solutions, to the mathematical equations which represent the physical
relationships of the G2’s two antennae and each visible satellite.
The Vector G2’s GPS engine’s software is able to place a constraint on the RTK solution,
because the Secondary GPS antenna has a fixed separation of 0.50 metre, inside the
G2’s enclosure, from the Primary antenna.
This separation allows the RTK search (i.e., for the location of the Secondary antenna) to
be constrained to the surface of a sphere with a radius 0.50 metre, centered on the
location of the Primary antenna.
Figure 16 – Secondary Antenna Search Volume
Note: The G2’s Moving-base-station RTK algorithm uses only GPS
signals to calculate heading. No Differential corrections are used in
this calculation, and thus the current DGPS source & signal
conditions never affect heading accuracy.
Determining Speed and Other Navigation Information
The balance of the information that the G2 can output is in general computed from the
position and heading data, or obtained directly from data or other information provided by
the GPS satellites.
For example, speed
8
is determined from the moment-to-moment changes in the
computed position of the Primary antenna’s phase centre
9
.
In contrast, time & date are obtained from data carried on the RF signals from the
satellites.
As well, the G2 can output a wide variety of information on the status of the GPS
satellites – e.g., how many are currently in view – and on its own status.
8
… more correctly referred to as Speed Over Ground, since it is based on changes in position.
9
… and thus is less accurate at very slow speeds, and is invalid when the vessel is stationary (see page 60).
www.busse-yachtshop.de | info@busse-yachtshop.de
44


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for ComNav Vector G2 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of ComNav Vector G2 in the language / languages: English as an attachment in your email.

The manual is 2,68 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info