CSI Wireless Seres, Справочное руководство

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Seres Reference Manual
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6. Frequently Asked Questions
6.1 General
Q – Are the SBAS services reliable for differential operation?
A – Yes, these services have proven themselves for some time now and
have shown excellent results. As both WAAS and EGNOS are in test
mode currently, they are not to be used as a sole means of navigation.
Additionally, as they are under test, there may be periods of outage or
times when the signal should not be used. We recommend that your refer
to Appendix D - Resources of this manual for Web sites that provide
details regarding the broadcast schedule of WAAS and EGNOS.
Q – Can the COAST technology work with corrections from an external
source?
A – Yes, the Seres will operate in a similar fashion with the COAST
technology as when using SBAS. However, SBAS corrections have the
advantage that they are separated into separate error components, allowing
the Seres to anticipate how errors will change over the COASTing period
with more consistent accuracy and for a longer period than regular RTCM
range corrections.
Q – Is e-Dif the solution for my positioning needs?
A – It’s difficult to say without knowing more about your application. e-Dif
is not a different solution / replacement for everyone’s application. Certain
applications lend themselves to successful e-Dif operation, such as crop
dusting. In this application, the aircraft must refuel and be filled with
chemicals quite frequently, perhaps every 20 minutes. This allows for a
new initialization when the aircraft lands. Provided that the user feels that
it’s efficient to do so, e-Dif can be successfully used in geographic regions
where the only differential services available are subscription-based. E-Dif,