Glossary
1 7 6 Lassen SQ GPS Receiver
IODE
Issue Of Data, Ephemeris. Part of the navigation data. It is the
issue number of the ephemeris information. A new ephemeris
is available usually on the hour. Especially important for
Differential GPS operation that the IODE change is tracked
at both the reference station and mobile stations.
jamming
Interference (in either transmitting or receiving signals)
caused by other radio signals at exactly or approximately the
same frequency
Kalman filter
A numerical method used to track a time-varying signal in
the presence of noise. If the signal can be characterized by
some number of parameters that vary slowly with time, then
Kalman filtering can be used to tell how incoming raw
measurements should be processed to best estimate those
parameters as a function of time.
masks
See satellite masks.
maximum PDOP
A measure of the maximum Position Dilution of Precision
(PDOP) that is acceptable in order for the GPS processor to
determine a location solution (see PDOP).
NAVSTAR
The name given to the GPS satellites, built by Rockwell
International, which is an acronym formed from NAVigation
System with Time And Ranging.
NMEA
National Marine Electronics Association. An association that
defines marine electronic interface standards for the purpose
of serving the public interest.
NMEA 0183
message
NMEA 0183 is a standard for interfacing marine electronics
navigational devices. The standard specifies the message
format used to communicate with marine
devices/components.
packet
An “envelope” for data, which contains addresses and error
checking information as well as the data itself.
parity
A scheme for detecting certain errors in data transmission.
Parity defines the condition (i.e., even or odd) of the number
of items in a set (e.g., bits in a byte).
Summary of Contents for SQ
Page 4: ......
Page 12: ...Contents xii Lassen SQ GPS Receiver...
Page 14: ...About this Manual xiv Lassen SQ GPS Receiver...
Page 46: ...2 Hardware Integration 32 Lassen SQ GPS Receiver...
Page 150: ...B TSIP Tool kit User s Guide 136 Lassen SQ GPS Receiver...
Page 166: ...C NMEA 0183 152 Lassen SQ GPS Receiver...
Page 171: ...Lassen SQ GPS Receiver 157 Specifications and Mechanical Drawings D...
Page 175: ...Lassen SQ GPS Receiver 161 Specifications and Mechanical Drawings D...
Page 179: ...Lassen SQ GPS Receiver 165 Specifications and Mechanical Drawings D...
Page 181: ...Lassen SQ GPS Receiver 167 Specifications and Mechanical Drawings D...
Page 182: ...D Specifications and Mechanical Drawings 168 Lassen SQ GPS Receiver...