cellphone location 1

distance

knowing only a radio signals wavelength is insufficient to determine its greatest reception ____

shorter

compared with a 100 MHz signal, a 1 GHz signal traveling in a vacuum has a ____ wavelength

antenna

electromagnetic energy is radiated into the surrounding space by a transmitting ____

encoded

a receiver recovers information by interpreting the way the transmitted signal was _____

amplitude

in AM transmission, information is carried through variations in the carrier’s _____

frequency

in FM transmission, information is carried through variations in the carrier’s _____

one

the two possible values of a binary bit are zero and _____

interference

radio reception may be influenced by terrain, walls, and ______ produced by other signals

closest

a serving cell site is not necessarily the geographically _____ site to the connected phone

satelite

to determine its position, a GPS receiver listens to signals from GPS ______ rather than sending requests to them

distance

timing advance and round-trip time can assist in estimating the approximate ______ separating a phone from a cell site

location

an estimated distance from a single cell site usually cannot identify a unique ______ for a phone

overlap

adjacent cellular sectors may ______ because their coverage areas do no always have regular boundaries

balancing

a phone may be served by an unexpected site or sector because of network load _______

precision

because GPS and historical cell-site analysis rely on different technologies, their results generally differ in _______

call

background network activity can create records even if the phone’s user is not placing a voice _______

off

a gap in call detail records does not establish that a phone was switched _______

legends

carrier documentation and field _______ should be consulted when interpreting fields specific to a carrier

timestamps

when reviewing record _______ an analyst may need to account for daylight-saving time changes

limitations

an analysis should identify the records it relies on, its assumptions, possible alternative explanations, and its _______