Simulations under Ideal and Nonideal Conditions for Characterization of a Passive Doppler Geographical Location System Using Extension of Data Reception Network

Table 4

(a) Satellite ephemeris and observed error for satellite SCD-2.

Satellite	Number of samples per pass	Errors in the satellite ephemeris (km)	Random errors in the simulated Doppler measurements (Hz)	Locations processed (sum of the 5 stations)	Mean location error for reception stations STA 1 to STA 5 (km)
					8.48±0.14
					8.57±0.13
	600	10	No	357	8.53±0.11
					8.38±0.13
					8.67±0.14
					8.84±0.18
					8.72±0.11
	7	10	“	410	8.83±0.18
					8.59±0.11
					8.75±0.07
					8.79±0.23
					8.71±0.26
	600	10	10 random	357	8.74±0.18
					8.67±0.18
					8.68±0.27
					9.19±0.35
					9.01±0.27
	7	10	“	410	9.64±0.14
SCD-2					9.77±0.12
					9.23±0.32
					10.53±0.26
					10.96±2.42
	600	10	10 biased	357	10.60±0.38
					10.76±0.24
					10.78±0.43
					11.41±0.41
					11.10±0.32
	7	10	“	412	11.17±0.21
					11.58±0.12
					11.50± 0.31
					10.89±0.32
					10.89±0.39
			10 random		10.63±0.24
	600	10	+ 10 biased	357	10.76±0.26
					10.81±0.30
					11.30±0.37
					11.58±0.33
	7	10	“	410	11.99±0.31
					11.73±0.23
					11.88±0.34
					10.65±0.36
					10.62±0.37
	600	10	10 biased	174	10.44±0.22
					10.79±0.26
					10.68±0.33
					11.72±0.33
					11.82±0.32
	7	10	“	155	11.02±0.28
					11.04±0.23
					11.84±0.36
SCD-2					10.69±0.48
					10.62±0.37
			10 random	174	10.45±0.14
	600	10	+ 10 biased		10.21±0.12
					10.86±0.34
					11.97±0.32
					11.47±0.28
	7	10	“	148	11.10±0.36
					11.05±0.31
					11.36±0.39

(b) Satellite ephemeris and observed error for satellite NOAA-17.

Satellite	Number of samples per pass	Errors in the satellite ephemeris (km)	Random errors in the simulated Doppler measurements (Hz)	Locations processed (sum of the 5 stations)	Mean location error for reception stations STA 1 to STA 5 (km)
					8.32±0.10
					8.22±0.10
	600	10	No	174	8.57±0.11
					8.12±0.10
					8.58±0.12
					8.77±0.14
					8.87±0.12
NOAA-17	7	10	“	164	8.70±0.19
					8.66±0.11
					8.78±0.12
					8.62±0.24
					8.69±0.27
	600	10	10 random	174	8.67±0.15
					8.55±0.14
					8.71±0.28
					9.56±0.21
					9.15±0.21
	7	10	“	160	9.11±0.31
					9.58±0.10
					9.19±0.31
					10.65±0.36
					10.62±0.37
	600	10	10 biased	174	10.44±0.22
					10.79±0.26
					10.68±0.33
					11.72±0.33
					11.82±0.32
NOAA-17	7	10	“	155	11.02±0.28
					11.04±0.23
					11.84±0.36
					10.69±0.48
					10.62±0.37
			10 random		10.45±0.14
	600	10	+ 10 biased	174	10.21±0.12
					10.86±0.34
					11.97±0.32
					11.47±0.28
	7	10	“	148	11.10±0.36
					11.05±0.31
					11.36±0.39