A method of implementing a real-time screening process for amplitude scintillation, the method comprising: detecting an amplitude scintillation event in the ionosphere during a sample time period at an amplitude scintillation monitor, wherein detecting the amplitude scintillation event during the sample time period at the amplitude scintillation monitor comprises determining an amplitude scintillation monitor discriminator (S4 ij (k)) in a current (k th) sample time period based on the signal to noise ratio power level for at least one reference receiver/satellite pair (RR i /SV j) meets exclusion criteria; 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 based at least in part on the determined amplitude monitor discriminator in the current sample time period; and readmitting excluded satellite measurement data collected after the end of the amplitude scintillation event as determined by the amplitude scintillation monitor by: counting the number of samples for which the amplitude scintillation monitor discriminator for an excluded reference receiver/satellite pair is less than a readmit threshold (S4 READMIT THRESHOLD); comparing the counted number of samples below the threshold that occurred prior to the current sample time period and after the reference receiver/satellite pair was excluded to a preselected number of samples. detecting an amplitude scintillation event in the ionosphere during a sample time period at an amplitude scintillation monitor, wherein detecting the amplitude scintillation event during the sample time period at the amplitude scintillation monitor comprises determining an amplitude scintillation monitor discriminator (S4 ij (k)) in a current (k th) sample time period based on the signal to noise ratio power level for at least one reference receiver/satellite pair (RR i /SV j) meets exclusion criteria; 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 based at least in part on the determined amplitude monitor discriminator in the current sample time period; and readmitting excluded satellite measurement data collected after the end of the amplitude scintillation event as determined by the amplitude scintillation monitor by: counting the number of samples for which the amplitude scintillation monitor discriminator for an excluded reference receiver/satellite pair is less than a readmit threshold (S4 READMIT THRESHOLD); comparing the counted number of samples below the threshold that occurred prior to the current sample time period and after the reference receiver/satellite pair was excluded to a preselected number of samples. counting the number of samples for which the amplitude scintillation monitor discriminator for an excluded reference receiver/satellite pair is less than a readmit threshold (S4 READMIT THRESHOLD); comparing the counted number of samples below the threshold that occurred prior to the current sample time period and after the reference receiver/satellite pair was excluded to a preselected number of samples.