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GPS > Bias
The following information is about Bias.
Bias Defined
All GPS measurements are affected by biases and errors. Their combined magnitudes will affect the accuracy of the positioning results (they will bias the position or baseline solution). Biases may be defined as being those systematic errors that cause the true measurements to be different from observed measurements by a "constant, predictable or systematic amount", such as, for example, all distances being measured too short, or too long. Biases must somehow be accounted for in the measurement model used for data processing if high accuracy is sought. There are several sources of biases with varying characteristics, such as magnitude, periodicity, satellite or receiver dependency, etc. Biases may have physical bases, such as the atmosphere effects on signal propagation or ambiguities in the carrier phase measurements, but may also enter at the data processing stage through imperfect knowledge of constants, for example any "fixed" parameters such as the satellite ephemeris information, station coordinates, velocity of light, antenna height errors, etc. Random errors will not bias a solution. However, outlier measurements, or measurements significantly affected by multipath disturbance (which may be considered a transient, unmodelled bias), will bias a solution if the proportion of affected measurements is relatively high compared to the number of unaffected measurements. For this reason, long period static GPS Surveying is more accurate (less likely to be biased) than "rapid static surveying" or kinematic (single-epoch) positioning.
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Off-site Bias Links, User Submitted
The following links have been collected through user bookmark submission in the Bias category. Please note, because these resources are off-site we cannot guarantee the accuracy or quality of any information.
Wed Dec 3
- Council spares judge his career: It ordered Judge Matlow to apologize in writing to a number of officials he insulted with "intemper ate language," ; to attend a seminar on judicial ethics, and obtain advice from his judicial superiors, if he "ever considers participating in a public debate in any matter, whether he has a personal interest in a subject or not?" They found that by mixing a personal civic crusade with his ethical responsibiliti es as a judge, Judge Matlow had undermined his effectiveness as a judge.
- Overcoming Bias: The Hypocrisy-Char ge Bias
- Better services without reform? It's just a con | Daniel Finkelstein - Times Online
- Procrastinatin g Again? How to Kick the Habit: Scientific American: The characteristic most strongly linked to procrastinatio n is conscientiousn ess?or lack thereof. A highly conscientious person is dutiful, organized and industrious. Therefore, someone who is not conscientious has a high probability of procrastinatin g. A person who is impulsive also is a procrastinator at risk. ?People who are impulsive can?t shield one intention from another,? Pychyl says. So they are easily diverted by temptations?sa y, the offer of a beer?that crop up in the middle of a project such as writing a term paper.
- Obama's Myths: Young Voters and Small Donors by Dick Morris on Creators.com - A Syndicate Of Talent: Ever since the voting age was dropped to 18, politicians have been waiting for young voters to rock the system. But turnout among the young has been consistently and disappointingl y low. From the manifest enthusiasm for Obama on campuses and the mammoth crowds of young admirers he generated, it appeared that the moment for the young had finally come. In the primaries and caucuses, young people flocked to Obama's bandwagon, often supplying his top-heavy margins of victory in caucus states that propelled him to victory over Hillary.
- Inductive bias - Wikipedia, the free encyclopedia
Tue Dec 2
- Overcoming Bias: Hard Takeoff
- Romero's Folly: NY Times Reporter Calls Chavez's Landslide Electoral Victory a 'Stinging Defeat' | the narcosphere
- GOEDEL MACHINE SUMMARY
- Maia Szalavitz, "Addiction pablum at the New Yorker", STATS Blog: "Last week, an extraordinary example of the sorry state of addiction coverage and treatment in the United States appeared in the New Yorker. The story focused on 'luxury rehab' as practiced in California 9;s Wonderland program; unfortunately, the magazine seemed to take the program's outdated views on addiction as representing the consensus among addiction experts about the appropriate medical treatment for this disorder." ;
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Off-site Bias Research Links
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