@article {Belzernavi.559, author = {Jessica Belzer and Frank van Graas}, title = {Detection of GPS C/A Code Self-Interference: Monitor Overview and Applicability}, volume = {70}, number = {1}, elocation-id = {navi.559}, year = {2023}, doi = {10.33012/navi.559}, publisher = {Institute of Navigation}, abstract = {Self-interference can cause large errors of up to tens of meters on the GPS C/A code pseudorange measurement. Although the probability of an occurrence of large self-interference errors is small, to enable the use of C/A code phase measurements in high accuracy or safety-of-life applications, a detection or mitigation method is needed. A stressful case of self-interference is modeled on a GPS hardware simulator to investigate monitor performance using real signal results. A summary of contributions in this paper follows. Self-interference pseudorange error characteristics within and mitigation requirements for the Ground Based Augmentation System (GBAS) Approach Service Type D (GAST-D) environment are identified. Existing monitors are evaluated for their response to self-interference and their ability to detect the error based on the GAST-D environment. This includes the potential for misidentification of the error. A novel Frequency Domain Cross-Correlation (FDCC) detector is proposed that can uniquely identify self-interference error with no siting constraints.}, issn = {0028-1522}, URL = {https://navi.ion.org/content/70/1/navi.559}, eprint = {https://navi.ion.org/content/70/1/navi.559.full.pdf}, journal = {NAVIGATION: Journal of the Institute of Navigation} }