Abstract: Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water can be concentrated and prepared for destruction in a pretreatment phase. Following annihilation of the PFAS in supercritical conditions to levels below 5 parts per trillion (ppt), the water effluent can be used to recover heat, returned to sub-critical conditions, and then released back into the environment.

Abstract: A method of implementing a real-time screening process for phase scintillation is presented. The method includes detecting a phase scintillation event during a sample time period at a phase scintillation monitor; excluding associated satellite measurement data from further use based on the detection of the phase scintillation event at the phase scintillation monitor; detecting an end to the phase scintillation event at the phase scintillation monitor; and readmitting associated satellite measurement data collected after the end of the phase scintillation event as detected by the phase scintillation monitor.

Abstract: Systems and methods for averaging satellite sigmas and readmitting excluded satellite measurements into differential corrections and integrity monitors are provided. In one embodiment, a method comprises: calculating a first RFI based averaged sigma and a second RFI based averaged sigma, wherein the first RFI based averaged sigma includes a sigma for the excluded satellite measurement and wherein the second RFI based averaged sigma does not include the sigma for the excluded satellite measurement; and, readmitting the excluded satellite measurement into either a differential correction broadcast or a respective integrity monitor when the first RFI based averaged sigma is less than or equal to the second RFI based averaged sigma.

Abstract: A method of implementing a real-time screening process for amplitude scintillation is presented. The method includes detecting an amplitude scintillation event during a sample time period at an amplitude scintillation monitor; excluding associated satellite measurement data from further use based on the detection of the amplitude scintillation event at the amplitude scintillation monitor; detecting an end to the amplitude scintillation event at the amplitude scintillation monitor; and readmitting associated satellite measurement data collected after the end of the amplitude scintillation event as determined by the amplitude scintillation monitor.

Abstract: A method for real time subset geometry screening comprises the steps of determining a list of satellites in view of a ground based augmentation system in a navigation satellite system for a subsequent time interval in the future, defining at least one set of subset geometries from the list of available satellites, calculating a respective first ?vig for each of the at least one set of subset geometries, setting a respective broadcast ?vig for each set of subset geometries as the larger of the first ?vig and a second ?vig, wherein the second ?vig was calculated for the previous time interval, saving the first ?vig for a next iteration of the method, and selecting from the plurality of broadcast ?vig to match an available broadcast constellation. ?vig is a vertical ionosphere gradient standard deviation.

Abstract: Systems and methods for averaging satellite sigmas and readmitting excluded satellite measurements into differential corrections and integrity monitors are provided. In one embodiment, a method comprises: calculating a first RFI based averaged sigma and a second RFI based averaged sigma, wherein the first RFI based averaged sigma includes a sigma for the excluded satellite measurement and wherein the second RFI based averaged sigma does not include the sigma for the excluded satellite measurement; and, readmitting the excluded satellite measurement into either a differential correction broadcast or a respective integrity monitor when the first RFI based averaged sigma is less than or equal to the second RFI based averaged sigma.

Abstract: Systems and methods for monitoring broadband radio frequency interference are provided. In certain embodiments, a method comprises calculating a smoothed carrier to noise value for a received signal on a processing unit, wherein the received signal is associated with a receiver and at least one satellite; calculating an average jammer power to noise power value for the receiver; calculating an instantaneous carrier to noise value for the received signal based on the average jammer power to noise power value and the smoothed carrier to noise value; comparing the instantaneous carrier to noise value to an exclusion threshold, and determining whether to exclude the received signal from calculations of global positioning data based on the comparison of the instantaneous carrier to noise value to the exclusion threshold; and when the received signal is excluded, monitoring the received signal for readmittance to the calculation of global positioning data.

Abstract: A method of implementing a real-time screening process for phase scintillation is presented. The method includes detecting a phase scintillation event during a sample time period at a phase scintillation monitor; excluding associated satellite measurement data from further use based on the detection of the phase scintillation event at the phase scintillation monitor; detecting an end to the phase scintillation event at the phase scintillation monitor; and readmitting associated satellite measurement data collected after the end of the phase scintillation event as detected by the phase scintillation monitor.

Abstract: A method of implementing a real-time screening process for amplitude scintillation is presented. The method includes detecting an amplitude scintillation event during a sample time period at an amplitude scintillation monitor; excluding associated satellite measurement data from further use based on the detection of the amplitude scintillation event at the amplitude scintillation monitor; detecting an end to the amplitude scintillation event at the amplitude scintillation monitor; and readmitting associated satellite measurement data collected after the end of the amplitude scintillation event as determined by the amplitude scintillation monitor.

Abstract: A method for real time subset geometry screening comprises the steps of determining a list of satellites in view of a ground based augmentation system in a navigation satellite system for a subsequent time interval in the future, defining at least one set of subset geometries from the list of available satellites, calculating a respective first ?vig for each of the at least one set of subset geometries, setting a respective broadcast ?vig for each set of subset geometries as the larger of the first ?vig and a second ?vig, wherein the second ?vig was calculated for the previous time interval, saving the first ?vig for a next iteration of the method, and selecting from the plurality of broadcast ?vig to match an available broadcast constellation. ?vig is a vertical ionosphere gradient standard deviation.

Abstract: Systems and methods for monitoring broadband radio frequency interference are provided. In certain embodiments, a method comprises calculating a smoothed carrier to noise value for a received signal on a processing unit, wherein the received signal is associated with a receiver and at least one satellite; calculating an average jammer power to noise power value for the receiver; calculating an instantaneous carrier to noise value for the received signal based on the average jammer power to noise power value and the smoothed carrier to noise value; comparing the instantaneous carrier to noise value to an exclusion threshold, and determining whether to exclude the received signal from calculations of global positioning data based on the comparison of the instantaneous carrier to noise value to the exclusion threshold; and when the received signal is excluded, monitoring the received signal for readmittance to the calculation of global positioning data.