Model: MC-1-DE
Doc Ref. No:-m05dom102
Issue No:-00
Page 9 of 76
GPS TIME SYNC UNIT MC-1-DE
rate time output with 1PPS signal. Satellite Navigation system is a system of satellites that provide
autonomous geo-spatial positioning with global coverage. It allows small
termine their location (longitude,
ing time signals transmitted along a
tion system that is used multiple navigation systems mainly GPS and GLONASS. GNSS als
satellite navigation systems of SBAS, QZSS, Galileo systems etc.
GPS satellite navigation system is maintained by United States of America since 1994 which consists
of at-least 24 operational satellites out of 32 satellites in six orbital planes
proximately 20,200 km. In typical GPS operation, four or more satellites must be visible to obtain an
accurate result. Satellite-based navigation systems use a version of
through calculations involving information from a number of satellites.
If one considers Figure 1 which shows a flat plane. X and Y are two known fixed points on the plane.
P is an unknown point. If the distances PX and PY can be measured, then the position of point P can
be calculated. Actually there is an ambiguity in that p
can be resolved if the position of a third fixed point Z is known since PZ is different to P’Z. This can be
summed up by saying that the unknown point P lies at the intersection of three circles based on the
known points X, Y and Z.
When the plane becomes three dimensional spaces, the circles become spheres. The intersection of
two sphere is a circle, and the intersection of three spheres is a pair of points analogous to the points
P and P’ of the flat plane case. As for the flat plane case a measurement from an extra fixed point is
required to absolutely resolve the ambiguity, although in many cases the ambiguous point would be
below the surface of the world. Thus to achieve the objective, GPS must provide acc
ment of distance from the unknown location of the receiver to 4 known points.
3. GPS Fundamentals
DE device is a GPS/GNSS based receiver Unit which provides acc
rate time output with 1PPS signal. Satellite Navigation system is a system of satellites that provide
spatial positioning with global coverage. It allows small electronic
termine their location (longitude, latitude, and altitude) to high precision (within a few meters) u
transmitted along a line of sight by radio from satellites. GNSS is a satellite navig
tion system that is used multiple navigation systems mainly GPS and GLONASS. GNSS als
satellite navigation systems of SBAS, QZSS, Galileo systems etc.
GPS satellite navigation system is maintained by United States of America since 1994 which consists
least 24 operational satellites out of 32 satellites in six orbital planes orbiting at an altitude of a
km. In typical GPS operation, four or more satellites must be visible to obtain an
based navigation systems use a version of triangulation to locate the user,
involving information from a number of satellites.
Figure 1 Basics of GPS
If one considers Figure 1 which shows a flat plane. X and Y are two known fixed points on the plane.
P is an unknown point. If the distances PX and PY can be measured, then the position of point P can
be calculated. Actually there is an ambiguity in that point P’ would also fit the measurements. This
can be resolved if the position of a third fixed point Z is known since PZ is different to P’Z. This can be
summed up by saying that the unknown point P lies at the intersection of three circles based on the
When the plane becomes three dimensional spaces, the circles become spheres. The intersection of
two sphere is a circle, and the intersection of three spheres is a pair of points analogous to the points
ase. As for the flat plane case a measurement from an extra fixed point is
required to absolutely resolve the ambiguity, although in many cases the ambiguous point would be
below the surface of the world. Thus to achieve the objective, GPS must provide acc
ment of distance from the unknown location of the receiver to 4 known points.
User’s Manual
GPS Fundamentals
which provides accu-
rate time output with 1PPS signal. Satellite Navigation system is a system of satellites that provide
electronic receivers to de-
altitude) to high precision (within a few meters) us-
satellites. GNSS is a satellite naviga-
tion system that is used multiple navigation systems mainly GPS and GLONASS. GNSS also include
GPS satellite navigation system is maintained by United States of America since 1994 which consists
orbiting at an altitude of ap-
km. In typical GPS operation, four or more satellites must be visible to obtain an
to locate the user,
If one considers Figure 1 which shows a flat plane. X and Y are two known fixed points on the plane.
P is an unknown point. If the distances PX and PY can be measured, then the position of point P can
oint P’ would also fit the measurements. This
can be resolved if the position of a third fixed point Z is known since PZ is different to P’Z. This can be
summed up by saying that the unknown point P lies at the intersection of three circles based on the
When the plane becomes three dimensional spaces, the circles become spheres. The intersection of
two sphere is a circle, and the intersection of three spheres is a pair of points analogous to the points
ase. As for the flat plane case a measurement from an extra fixed point is
required to absolutely resolve the ambiguity, although in many cases the ambiguous point would be
below the surface of the world. Thus to achieve the objective, GPS must provide accurate measure-
