Quantifying the Protonospheric Effect on Prism
Quantifying the Protonospheric Effect on Prism by Kelly B. Doser, published by BiblioScholar on November 12, 2012, is a detailed examination of the total electron content (TEC) contribution to a Parameterized Real-time Ionospheric Specification Model (PRISM). This edition spans 110 pages and is presented in English. The study focuses on the challenges faced in incorporating protonospheric TEC measurements from Global Positioning Satellites (GPS) into PRISM calculations, highlighting the complexities of calibration and data quality.
Readers will find an in-depth analysis of the data collection process, which involved 46 days of GPS measurements, with only 35 days ultimately contributing to the study due to various data issues. The book discusses the impact of low elevation angles and multipath effects on GPS trajectories, revealing that these factors introduced significant errors in the measurements. The findings indicate that while PRISM can effectively model the ionosphere during quiet periods, the errors from GPS TEC measurements often overshadow the model’s performance, with average errors ranging from 10.4% to 17%. This work is relevant for those interested in education and teaching within the context of ionospheric studies.
Official synopsis Publisher
The total electron content (TEC) contribution to a Parameterized Real-time Ionospheric Specification Model (PRISM) calculation has been studied using protonospheric TEC measurements made by Global Positioning Satellites (GPS). Including the protonosphere proved challenging to both the calibration of GPS measurements and execution of PRISM. Though 46 days of GPS measurements were acquired, only 40 were successfully calibrated, and only 35 of those were used in the study. Data issues such as availability and completeness as well as measurement quality affected 6 of the days used. Calibration was done at Pittsburgh by excluding all measurements below 40.75 N. latitude cutoff. This latitude produced a plasmaspheric contribution to GPS TEC of 2.5 — 3.0 TEC units (TECu). Five calibrated days were collected during geomagnetic storm and recovery days, and could not be used in PRISM, reducing the data set to 35 days. Throughout the data, GPS trajectories added up to 3 TECu of error due to low elevation angles and multipath affects. PRISM was found to model the ionosphere with 10.4% to 17% average error, and included a protonospheric contribution result of 1.0 TECu. GPS measurement errors on the order of 3.0 TECu overwhelmed the 17% errors found in PRISM under the same conditions. During quiet periods, the model worked well, with most of the error coming from the GPS TEC measurements.
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