... result of the changes in the suns radiation and the Earths magnetic
field. For example, the F1 layer disappears during the night and is more
pronounced in the summer than in the winter [14].
The ... and the navigation mes-
sage). However, after the AS activation, the P-code was encrypted to
Y-code. This means that the receiver cannot output either the P-code or
th...
... causes the end-diastolic pressure-
volume curve to shift up and to the left, as shown in Figure 4-2 7. This shift will reduce
the end-diastolic volume and increase the end-diastolic pressure at the ... AT
1
recep-
tors), endothelin-I (via ET
A
receptors), and
acetylcholine (via M
3
receptors) activate phos-
pholipase C through the Gq-protein, causing
the formation of IP...
... Likewise, any ligand molecule must be
76
Enzymes: A Practical Introduction to Structure, Mechanism, and Data Analysis.
Robert A. Copeland
Copyright
2000 by Wiley-VCH, Inc.
ISBNs: 0-4 7 1 -3 592 9-7 (Hardback); ... sites. The data and fit to Equation 4.27 are the same as for Figure 4.5.
in all fields put a great deal of emphasis on finding mathematical transform-...
... that the P-code is a stream of about
2. 35 ì 10
14
chips! The 26 6-day-long code is divided into 38 segments; each
is 1 week long. Of these, 32 segments are assigned to the various GPS satel-
lites. ... to GPS
the Y-code, which has the same chipping rate as the P-code. This encryp-
tion is known as the antispoofing (AS).
The GPS navigation message is a data stream...
... circles.
Figure 3. 8 shows the sky plot for Toronto on April 13, 2001, which was
42 Introduction to GPS
N
0
33 0
30 0
W270
240
210
180
S
150
120
90 E
60
30
Figure 3. 8 GPS sky plot for Toronto on April 13, 2001.
... precision of the GPS positioning at the one-sigma (1-s) level.
To obtain the precision at the 2-s level, sometimes referred to as approxi-
mately...
... clear
from the definition of the x and z axes that the xz-plane contains the
mean Greenwich meridian. The y-axis is selected to make the coordinate
system right-handed (i.e., 90° east of the x-axis, ... meridian
Figure 4. 8 UTM projection.
1
180 W°
176 W°
168 W°
162 W°
23
Equator
Figure 4. 9 UTM zoning.
4. 2.2 The WGS 84 and NAD 83 systems
The World Geodetic Syst...
... latter.
5. 5 Stop-and-go GPS surveying
Stop-and-go surveying is another carrier-phase-based relative positioning
technique. It also employs two or more GPS receivers simultaneously
tracking the same ... solution,
76 Introduction to GPS
Base
(fixed)
Rover
(moving)
Figure 5. 5 Stop-and-go GPS surveying.
The expected accuracy from a geodetic quality receiver is typically 5...
... Tiberius, A New Way to
Fix Carrier-Phase Ambiguities, GPS World, Vol. 6, No. 4, April 1995,
pp. 58 61 .
[5] DeLoach, S. R., D. Wells, and D. Dodd, Why On -the- Fly? GPS World,
Vol. 6, No. 5, May 1995, ... are the real-valued numbers along with
their uncertainty parameters (so-called covariance matrix) only. These
real-valued numbers are in fact difficult to separate from the...
... broadcasting the real-time DGPS cor-
rections of their WADGPS system [6]. The system is based on using the
already existing FM radio broadcasts to deliver the DGPS corrections to
local users (Figure 7. 4). ... in the L-band. To access
either service, a subscriber needs the system data receiver to receive and
decode the DGPS corrections. The data receiver must be...
... September 19 22, 2000,
pp. 22522262.
[11] Driscoll, C., Wireless Caller Location Systems, GPS World,Vol .9, No.
10, October 199 8, pp. 44 49.
GPS Integration 127
9
GPS Integration
GPS has found ... trees
Contours
FH
Roads
Figure 9. 1 GPS/ GIS integration.
Figure 9. 2 GPS/ LRF integration.
provided that the real-time DGPS corrections can be received. Once the
processing...
... of the integrated system is a GPS- based
real-time fleet-monitoring system. Low-cost standalone GPS receivers may
be used, as only low-accuracy positioning information is needed. To avoid
GPS ... the integrated
GPS/ inertial system. The latter system, LIDAR, uses an airborne laser scan-
ner to measure the altitude of the points above the ground level [16]. Com-
bi...
... receivers use the frequency channel
rather than the code to distinguish the satellites. The chipping rates for the
P-code and the C/A-code are 5 .11 and 0. 511 Mbps, respectively. The
GLONASS navigation ... problems with GPS/ GLONASS
integration. The first one is that both GPS and GLONASS systems use dif-
ferent coordinate frames to express the position of their sat...
...
Team-Fly
đ
Appendix A
GPS Accuracy and Precision Measures
The term accuracy is used to express the degree of closeness of a measure-
ment, or the obtained solution, to the true value. The ... equivalent to 100m
(2drms) for a ratio of 2.5.
The spherical error probable (SEP) is used to express the accuracy of
the 3-D case. SEP means that there is a 50% chance tha...