H220 Integrator Guide
Chapter 2 – Board Overview
Page 8 of 28
Atlas L-band
Atlas L-band corrections are available worldwide. With Atlas, the positioning accuracy does not
degrade as a function of distance to a base station, as the data content is not composed of a
single base station’s information, but an entire network’s information. Atlas L-band is
Hemisphere's industry leading correction service, and can be added as a subscription.
Atlas L-band has the following benefits:
Positioning accuracy -
Competitive positioning accuracies down to 30 cm RMS in
certain applications
Positioning sustainability -
Cutting edge position quality maintenance in the absence
of correction signals, using Hemisphere’s patented technology
Scalable service levels -
Capable of providing virtually any accuracy, precision and
repeatability level in the 30 to 100 cm range
Convergence time -
Industry-leading convergence times of 10-40 minutes
H220 is supported by our easy-to-use Atlas Portal
https://www.atlasgnss.com/
which empowers
you to update firmware and enable functionality, including Atlas subscriptions for accuracies
from meter to sub-decimeter levels.
For more information about Atlas L-band, see:
http://hgnss.com/Atlas.
aRTK Position Aiding
aRTK is an innovative feature available in Hemisphere’s H220 that greatly mitigates the impact
of land-based communication instability. Powered by Hemisphere’s Atlas L-band system
service, aRTK augments the ability to maintain an RTK solution when the original RTK data link
is lost or interrupted. The aRTK provides an additional layer of communication redundancy to
RTK users, assuring that productivity is not impacted by intermittent data connectivity.
H220 receives aRTK augmentation correction data over satellite, while also receiving the land-
based RTK correction data. The receiver internally operates with two sources of RTK correction,
creating one additional layer of correction redundancy as compared to typical RTK systems.
After a few seconds , the process is established, and the receiver can operate in the absence of
either correction source, and the receiver is able to continue generating RTK positions in case
the land-based RTK correction source becomes unavailable.
