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GPS > Ambiguity
The following information is about Ambiguity.
Ambiguity Defined
Carrier phase measurements can only be made in relation to a cycle or wavelength of the L1 or L2 carrier waves because it is impossible to discriminate different carrier cycles (they are all "sine waves" if one ignores the modulated messages and PRN codes). Integrated carrier phase measurements may be made by those receivers intended for carrier phase-based positioning. In this case the change in receiver-satellite distance can be measured by counting the number of whole wavelengths since initial signal lock-on and adding the instantaneous fractional phase measurement. However, such a measurement is a biased range or distance measurement because the initial number of whole (integer) wavelengths in the receiver-satellite distance is unknown. This unknown value is referred to as the "ambiguity". It is different for the different satellites, and different for the L1 and L2 measurements. It is, however, a constant if signal tracking continues uninterrupted through an observation session. If there is signal blockage, then a "cycle slip" occurs, causing the new ambiguity after the cycle slip to be different from the value before. Cycle slip repair therefore restores the continuity of carrier cycle counts and ensures that there is only one ambiguity for each satellite-receiver pair.
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Off-site Ambiguity Links, User Submitted
The following links have been collected through user bookmark submission in the Ambiguity category. Please note, because these resources are off-site we cannot guarantee the accuracy or quality of any information.
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- Nixon administration pressured Israel on nukes: Inside the Nixon administration four decades ago, American officials weighed options to pressure Israel to declare that it had a nuclear weapons program. U.S. officials concluded Israel was "actively working to improve its capability to produce nuclear weapons on short notice." In an unsigned National Security Council memo, prepared sometime between April 1969 and March 1970, officials worried that the program might make elusive peace with the Arabs even harder to attain.
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- The neocon mind « ACCUMULATING PERIPHERALS: "But in fact there?s a deeper kernel to the neocon mind, and that is an inability to cope with the ambiguity of information; or, to say the same thing, the ambiguity of reality; or, to say the same thing, the multiplicity of human subjectivity. The neocon mind is binary"
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- Inspire : On Branding, Advertising, Communications , Marketing, Complexity, Ambiguity, Chance, Authenticity, Perfection and Conversations: We move from a centralized, top-down, repetitive, one-dimensiona l, controlled, perfected, one-2-many, reductionistic , modernistic view on branding towards a new model of decentralized, egalitarian, multi-faceted/ dimensional, holistic, many-2-many, postmodern conversations allowing for remixability, open source creation, interpretation , chance, ambiguity, serendipity and complexity.
If you would like to find additional social bookmark based links on the topic of we recommend the Open Tag Directory > Ambiguity. If you would like to find related tags we recommend Tag Patterns > Ambiguity
Off-site Ambiguity Research Links
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