A short description of one of the entries to the 2nd Galileo Hackathon, held in Gdansk in May 2017. By Team ENAC. Video demonstration at https://youtu.be/kmVtNKvKR0g

1. 2nd Galileo Hackathon
ENAC Team
CoGeo project

2. Motivation and objectives
•To provide a more precise position for the smartphones
based on differential positioning algorithms.
•Using multi-constellation to bring better accuracy to the
new-generation phones that have enabled Galileo System.
•Build the community where people can send pseudorange
corrections and share locations to their so-called 'Geo-
friends'.
•Potential move: Build the customized reference station
network!

3. Main idea
The main idea is to use the new-generation phones(which
has a much better accuracy due to advantages of multi-
constellation and ability to use GNSS raw measurements)
as a reference station, they calculate the pseudorange
correction and upload to the server, the other phones(with
worse accuracy) near that region can download this
correction and provide themselves with a better positioning
ability.

4. Main techniques used
•Newly-released raw measurement on android
platform(android.location)
•Differential positioning algorithm which will provide more
accurate results.
•Galileo included in multi-constellation.
•PVT solution based on corrections.

5. Potentials and benefits
Since the current reference station network in the world is still
sparse, we are planning to build a customized reference station
network in the city, where chosen points(such as bus stations) are
given a measurement with centimeter-level accuracy(with PPP in
static mode we can get less then 1cm even), we use this reference
network to provide a much more accurate pseudorange correction
to the users. Having these correction information broadcasting in the
community we built, we can provide a very accurate positioning
service to the mass market, it has the potential to become an very
important infrastructure in the future. For example for UAV deliveries
that will follow the position of our smartphone.