Nathan M. Holzrichter, MITRE Corporation; Edward J. Fernadez, MITRE Corporation
Keywords: Observations, Residuals, GPS, CDDIS
Abstract:
Understanding the measurement errors for a sensor is crucial when using the measurements in a precision application. Expected measurement error informs how data from multiple sensors can be used together. Consistent biases in the data can be compensated for. An up-to-date history of measurement error can also yield insights into the sensor’s health and operations.
This paper describes a method to use navigation messages archived by NASA Crustal Dynamics Data Information System (CDDIS) from GPS satellites to compute the residuals of metric observations collected on satellites by ground-based optical sensor. The method of calculating residuals is described here so as to lower the barrier to entry, both in accessing the required data and assembling the required algorithms, in an attempt to promote widespread use of this or equivalent methods. This paper presents several sets of residuals produced using this method from observations collected by the MITRE Telescope Network. This method can be adapted to compute residuals using satellites from other PNT constellations whose navigation messages are also hosted on CDDIS.
Date of Conference: September 27-20, 2022
Track: Astrodynamics