Magellan MobileMapper CX Getting Started Guide - Page 74

Optimizing Accuracy, General Guidelines - office

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English Optimizing Accuracy General Guidelines There are five basic rules for recording MobileMapper CX rover data so as to achieve the optimal accuracy: 1. Allow the receiver to have full "view" of the sky the entire time a job is open, not just when logging data to a feature. There are three things you can do to improve signal reception: • While you do not need a survey-grade external antenna for sub-meter accuracy, using one will yield better accuracy in all environments. • If you are not using an external antenna, keep the MobileMapper CX receiver at a 45-degree angle the entire time a job is open (or as long as possible). • If you are not using an external antenna, keep the MobileMapper CX receiver as high as possible the entire time a job is open (or as long as possible). 2. When you record a point feature, remain stationary for 10 seconds both before opening the feature and after closing the feature. 3. Average all point features for at least 30 seconds. 4. Make sure you are using the latest firmware (both the Operating System firmware and GPS firmware) for the MobileMapper CX receiver and the latest version of MobileMapper Office). 5. Adjust the SNR, PDOP and Elevation masks on the receiver to reflect your environment. 66

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English
66
Optimizing Accuracy
General Guidelines
There are five basic rules for recording MobileMapper CX rover
data so as to achieve the optimal accuracy:
1. Allow the receiver to have full “view” of the sky the entire
time a job is open, not just when logging data to a feature.
There are three things you can do to improve signal recep-
tion:
•
While you do not need a survey-grade external antenna
for sub-meter accuracy, using one will yield better
accuracy in all environments.
•
If you are not using an external antenna, keep the
MobileMapper CX receiver at a 45-degree angle the
entire time a job is open (or as long as possible).
•
If you are not using an external antenna, keep the
MobileMapper CX receiver as high as possible the
entire time a job is open (or as long as possible).
2. When you record a point feature, remain stationary for 10
seconds both before opening the feature and after closing
the feature.
3. Average all point features for at least 30 seconds.
4. Make sure you are using the latest firmware (both the
Operating System firmware and GPS firmware) for the
MobileMapper CX receiver and the latest version of
MobileMapper Office).
5. Adjust the SNR, PDOP and Elevation masks on the
receiver to reflect your environment.