Leica SpiderQC v7.5 Quality Report


Program Run: 2021/06/07 11:03:06.17

File Details:


Observation File: algc158k.21o
GPS Navigation File: algc158k.21n
GLONASS Navigation File: algc158k.21g
Galileo Navigation File: algc158k.21l
BeiDou Navigation File: algc158k.21f
Quality Testing:  Fail (See below for details) 

Station Details:


Marker Name/Number:  ALGC  13456M001   
Observer/Agency:  IECA  Junta de Andalucia   
Receiver #/Type/Vers:  1832466  LEICA GR50  4.31/7.403 
Antenna #/Type:  2110213  LEIAR20 LEIM   
Antenna Offsets (HEN):  0.000  0.000  0.000 
Approx Position (XYZ):  5135570.619  -489449.771  3738221.713 
Approx Position (plh):  36° 06' 39.74829" N  5° 26' 39.03897" W  117.170m 
Diff. Est-Header:  3.6 m dX  -4.5 m dY  0.6 m dZ 
Diff. Est-Header:  5.8 m (3600 estimates) 

Session Summary:


Time of first obs:  2021/06/07 10:00:00.00 GPS 
Time of last obs:  2021/06/07 10:59:59.00 GPS 
Session length:  59.98 minutes 
GPS week:  2161, day 1 
Observation interval:  1.00 seconds 
UTC leap seconds:  18 seconds 

Num SVs with obs:  36 
Num SVs with nav:  102 
Total GPS orbits:  44 
Total GLONASS orbits:  35 
Total Galileo orbits:  87 
Total BeiDou orbits:  31 
Total QZSS orbits: 
Total NavIC orbits: 
SVs with obs:  G4 G5 G10 G16 G18 G20 G23 G25 G26 G27 G29 G31 R12 R13 R21 R22 R23 R24 E5 E11 E12 E24 E25 E31 E33 E36 C5 C8 C11 C12 C13 C21 C23 C24 C25 C28  
SVs without obs:  G1 G2 G3 G6 G7 G8 G9 G11 G12 G13 G14 G15 G17 G19 G21 G22 G24 G28 G30 G32 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R14 R15 R16 R17 R18 R19 R20 E1 E2 E3 E4 E6 E7 E8 E9 E10 E13 E14 E15 E16 E17 E18 E19 E20 E21 E22 E23 E26 E27 E28 E29 E30 E32 E34 E35 C1 C2 C3 C4 C6 C7 C9 C10 C14 C15 C16 C17 C18 C19 C20 C22 C26 C27 C29 C30 C31 C32 C33 C34 C35 C36 C37 J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 I1 I2 I3 I4 I5 I6 I7  
SVs with nav:  G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 G11 G12 G13 G14 G15 G16 G17 G18 G19 G20 G21 G22 G23 G24 G25 G26 G27 G28 G29 G30 G31 G32 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 E1 E2 E3 E4 E5 E7 E8 E9 E11 E12 E13 E14 E15 E18 E19 E21 E24 E25 E26 E27 E30 E31 E33 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C16 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30  
SVs without nav:  E6 E10 E16 E17 E20 E22 E23 E28 E29 E32 E34 E35 E36 C1 C2 C3 C4 C15 C17 C18 C31 C32 C33 C34 C35 C36 C37  
User Disabled SVs:  None 
Meteo epochs: 
Auxiliary epochs: 

Quality Testing:


  Pass/Fail   Details 
General Tests 
Epochs With Data:  Pass  Value 100.0 %, Threshold 99.0 % 
File Format:  Pass   
RX Clock:  Pass   
Other:  Pass   
     
GPS Specific Tests 
Cycle Slips:  Pass  Value 1 slips, Threshold 48 slips 
Multipath:  Pass  Value 0.09m MP1 / 0.08m MP2 / 0.14m MP5, Threshold 0.5 m 
Data Completeness:  Pass  Value 100.0 %, Threshold 95.0 % 
Navigation Data:  Pass   
     
GLONASS Specific Tests 
Cycle Slips:  Pass  Value 2 slips, Threshold 97 slips 
Multipath:  Pass  Value 0.11m MP1 / 0.10m MP2, Threshold 0.5 m 
Data Completeness:  Pass  Value 94.4 %, Threshold 90.0 % 
Navigation Data:  Pass   
     
Galileo Specific Tests 
Cycle Slips:  Pass  Value 1 slips, Threshold 120 slips 
Multipath:  Pass  Value 0.07m MP1 / 0.11m MP5a / 0.11m MP5b / 0.04m MP5a+b, Threshold 0.5 m 
Data Completeness:  Pass  Value 100.0 %, Threshold 90.0 % 
Navigation Data:  Pass   
     
BeiDou Specific Tests 
Cycle Slips:  Pass  Value 0 slips, Threshold 117 slips 
Multipath:  Pass  Value 0.31m MP1 / 0.12m MP2b, Threshold 0.5 m 
Data Completeness:  Pass  Value 100.0 %, Threshold 90.0 % 
Navigation Data:  Fail   

General Quality Indicators:


Tracking   
Num obs > 0°:  111436 
Num possible obs > 0°:  113547 
Num obs with invalid nav: 
Num obs without nav:  740 
Num obs to unhealthy SV: 
Num obs with WLF change: 
Num complete loss of lock: 

Epochs with < 5 SV > 15°:  (0.0 %) 
Epochs with all SV > 15°:  2643  (73.4 %) 
Epochs with full data > 15°:  2643  (73.4 %) 

Satellite Geometry 
DOP  Minimum  Maximum  Average 
PDOP  2.0  2.4  2.1 
GDOP  2.4  2.9  2.6 

Data Gaps 
Num epochs with data:  3600 
Num epochs without data: 
Data Gaps:  0.00 seconds 

List of Data Gaps (-) 
Duration  Start Time  End Time 
None     

Non-tracked satellites > 15° (^): 
SV  Time (minutes)  Epoch Range  Elevation Range  Azimuth Range 
R13  15.933  1 / 957  15.90° / 23.08°  324.45° / 326.64° 
Total:  15.933 (956 observations) 

Receiver Clock 
Clock Slips > 15°: 
Max RX clock offset:  0.000025 ms (at 2021/06/07 10:00:45.00) 
Num of RX clock resets: 
Total clock drift:  +0.000000 ms 
Rate of clock drift:  +0.000 ms/hr 
Av time between resets:  0.000 minute(s) 

Quality Indicators by Satellite System:


  Total  GPS  GLONASS  Galileo  BeiDou  QZSS  NavIC 
Tracking information over 0° 
Num obs > 0°:  111436  40981  18274  22138  30043 
Num possible obs > 0°:  113547  41485  19420  22636  30006 
Num obs with invalid nav: 
Num obs without nav:  740  520  220 
Num obs to unhealthy SV: 
               
Tracking over Elevation Mask (15°) 
Num obs > 15°:  79546  23917  16131  20059  19439 
% obs > 15°:   98.8 %  100.0 %  94.4 %  100.0 %  100.0 % 
Num possible obs > 15°:  80503  23917  17088  20059  19439 
Num complete obs > 15°:  79546  23917  16131  20059  19439 
% complete obs > 15°:   98.8 %  100.0 %  94.4 %  100.0 %  100.0 % 
Num obs with WLF change:  
Average # SV per Epoch:  22.1   6.6   4.5   5.6   5.4  
               
Observation ratio w.r.t. L1/E1/B1I: 
Obs L2/B1C:  1.730   1.849   1.553  
Obs E5b/B2I:  0.728   1.000   0.447  
Obs L5/E5a/B2a:  0.754   0.548   1.000  
Obs E5a+b/B2a+b:  1.000   1.000  
Obs L6/E6/B3I/G2a: 
Obs G3: 

Cycle Slips               
Num cycle slips > 15°: 
% slips per complete obs:  0.005 %  0.004 %  0.012 %  0.005 % 
Num complete obs per slip:  19886   23917   8065   20059  
IOD Slips > 15°: 
Outliers > 15°: 
LLI : Obs L1/E1/B1I:  0.0000   0.0001  
LLI : Obs L2/B1C:  0.0000   0.0000  
LLI : Obs E5b/B2I: 
LLI : Obs L5/E5a/B2a: 
LLI : Obs E5a+b/B2a+b: 
LLI : Obs L6/E6/B3I/G2a: 
LLI : Obs G3: 

Multipath               
MP (L1/E1/B1I) RMS:  0.150 m  0.090 m  0.110 m  0.066 m  0.314 m 
MP (L2/B1C) RMS:  0.086 m  0.081 m  0.097 m 
MP (L5/E5a/B2a) RMS:  0.125 m  0.139 m  0.113 m 
MP (E5b/B2I) RMS:  0.111 m  0.107 m  0.119 m 
MP (E5a+b/B2a+b) RMS:  0.043 m  0.043 m 
MP (L6/E6/B3I/G2a) RMS: 
MP (G3) RMS: 

Extended Quality Information:


Tracking by observation type > 15°: 
Type Code Phase SNR Doppler
L1C 100.0 %
100.0 %
100.0 %
100.0 %
L1I 100.0 %
100.0 %
100.0 %
100.0 %
L2C 77.7 %
77.7 %
77.7 %
77.7 %
L2P 77.7 %
77.7 %
77.7 %
77.7 %
L2S 84.9 %
84.9 %
84.9 %
84.9 %
L2W 100.0 %
100.0 %
100.0 %
100.0 %
L5Q 75.4 %
75.4 %
75.4 %
75.4 %
L7I 44.7 %
44.7 %
44.7 %
44.7 %
L7Q 100.0 %
100.0 %
100.0 %
100.0 %
L8Q 100.0 %
100.0 %
100.0 %
100.0 %

Tracking by satellite > 15°: 
SV GPS Min Elev Max Elev Possible Observations Actual Observations Observations with Invalid Ephemeris Cycle Slips
G16 25.81° 48.70° 3600 3600 (100.0 %)
0 (0.0 %) 0
G18 60.92° 66.20° 3600 3600 (100.0 %)
0 (0.0 %) 0
G23 15.00° 21.02° 1177 1177 (100.0 %)
0 (0.0 %) 0
G25 15.00° 22.91° 1538 1538 (100.0 %)
0 (0.0 %) 1
G26 52.19° 77.23° 3600 3600 (100.0 %)
0 (0.0 %) 0
G27 15.00° 31.42° 3202 3202 (100.0 %)
0 (0.0 %) 0
G29 17.56° 38.79° 3600 3600 (100.0 %)
0 (0.0 %) 0
G31 41.92° 67.12° 3600 3600 (100.0 %)
0 (0.0 %) 0

SV GLONASS Min Elev Max Elev Possible Observations Actual Observations Observations with Invalid Ephemeris Cycle Slips
R12 65.94° 86.43° 3600 3600 (100.0 %)
0 (0.0 %) 0
R13 23.09° 44.80° 3600 2643 (73.4 %)
0 (0.0 %) 2
R21 15.00° 36.05° 2688 2688 (100.0 %)
0 (0.0 %) 0
R22 53.73° 84.95° 3600 3600 (100.0 %)
0 (0.0 %) 0
R23 21.14° 46.68° 3600 3600 (100.0 %)
0 (0.0 %) 0

SV Galileo Min Elev Max Elev Possible Observations Actual Observations Observations with Invalid Ephemeris Cycle Slips
E11 39.75° 63.68° 3600 3600 (100.0 %)
0 (0.0 %) 0
E12 57.58° 71.64° 3600 3600 (100.0 %)
0 (0.0 %) 0
E24 73.69° 78.69° 3600 3600 (100.0 %)
0 (0.0 %) 0
E25 27.51° 46.44° 3600 3600 (100.0 %)
0 (0.0 %) 0
E31 23.49° 39.92° 3600 3600 (100.0 %)
0 (0.0 %) 1
E33 15.00° 25.64° 2059 2059 (100.0 %)
0 (0.0 %) 0
E36 - - 0 0 (-)
520 (-) 0

SV BeiDou Min Elev Max Elev Possible Observations Actual Observations Observations with Invalid Ephemeris Cycle Slips
C8 - - 0 0 (-)
220 (-) 0
C11 66.28° 84.13° 3600 3600 (100.0 %)
0 (0.0 %) 0
C12 18.05° 39.16° 3600 3600 (100.0 %)
0 (0.0 %) 0
C13 15.00° 17.50° 1496 1496 (100.0 %)
0 (0.0 %) 0
C23 40.69° 60.43° 3600 3600 (100.0 %)
0 (0.0 %) 0
C24 15.00° 25.86° 1750 1750 (100.0 %)
0 (0.0 %) 0
C25 53.97° 81.74° 3600 3600 (100.0 %)
0 (0.0 %) 0
C28 15.00° 24.16° 1793 1793 (100.0 %)
0 (0.0 %) 0

Missing phase observations by satellite > 15°: 
SV GPS Observations Missing L1C Missing L2S Missing L2W Missing L5Q
G16 4.5 %
0.0 %
100.0 %
0.0 %
100.0 %
G18 4.5 %
0.0 %
0.0 %
0.0 %
0.0 %
G23 1.5 %
0.0 %
0.0 %
0.0 %
0.0 %
G25 1.9 %
0.0 %
0.0 %
0.0 %
0.0 %
G26 4.5 %
0.0 %
0.0 %
0.0 %
0.0 %
G27 4.0 %
0.0 %
0.0 %
0.0 %
0.0 %
G29 4.5 %
0.0 %
0.0 %
0.0 %
100.0 %
G31 4.5 %
0.0 %
0.0 %
0.0 %
100.0 %

SV GLONASS Observations Missing L1C Missing L2C Missing L2P
R12 4.5 %
0.0 %
0.0 %
0.0 %
R13 3.3 %
0.0 %
0.2 %
0.2 %
R21 3.4 %
0.0 %
0.0 %
0.0 %
R22 4.5 %
0.0 %
0.0 %
0.0 %
R23 4.5 %
0.0 %
100.0 %
100.0 %

SV Galileo Observations Missing L1C Missing L5Q Missing L7Q Missing L8Q
E11 4.5 %
0.0 %
0.0 %
0.0 %
0.0 %
E12 4.5 %
0.0 %
0.0 %
0.0 %
0.0 %
E24 4.5 %
0.0 %
0.0 %
0.0 %
0.0 %
E25 4.5 %
0.0 %
0.0 %
0.0 %
0.0 %
E31 4.5 %
0.0 %
0.0 %
0.0 %
0.0 %
E33 2.6 %
0.0 %
0.0 %
0.0 %
0.0 %

SV BeiDou Observations Missing L2I Missing L7I
C11 4.5 %
0.0 %
0.0 %
C12 4.5 %
0.0 %
0.0 %
C13 1.9 %
0.0 %
0.0 %
C23 4.5 %
0.0 %
100.0 %
C24 2.2 %
0.0 %
100.0 %
C25 4.5 %
0.0 %
100.0 %
C28 2.3 %
0.0 %
100.0 %

Missing code observations by satellite > 15°: 
SV GPS Missing C1C Missing C2S Missing C2W Missing C5Q
G16 0.0 %
100.0 %
0.0 %
100.0 %
G18 0.0 %
0.0 %
0.0 %
0.0 %
G23 0.0 %
0.0 %
0.0 %
0.0 %
G25 0.0 %
0.0 %
0.0 %
0.0 %
G26 0.0 %
0.0 %
0.0 %
0.0 %
G27 0.0 %
0.0 %
0.0 %
0.0 %
G29 0.0 %
0.0 %
0.0 %
100.0 %
G31 0.0 %
0.0 %
0.0 %
100.0 %

SV GLONASS Missing C1C Missing C2C Missing C2P
R12 0.0 %
0.0 %
0.0 %
R13 0.0 %
0.0 %
0.0 %
R21 0.0 %
0.0 %
0.0 %
R22 0.0 %
0.0 %
0.0 %
R23 0.0 %
100.0 %
100.0 %

SV Galileo Missing C1C Missing C5Q Missing C7Q Missing C8Q
E11 0.0 %
0.0 %
0.0 %
0.0 %
E12 0.0 %
0.0 %
0.0 %
0.0 %
E24 0.0 %
0.0 %
0.0 %
0.0 %
E25 0.0 %
0.0 %
0.0 %
0.0 %
E31 0.0 %
0.0 %
0.0 %
0.0 %
E33 0.0 %
0.0 %
0.0 %
0.0 %

SV BeiDou Missing C2I Missing C7I
C11 0.0 %
0.0 %
C12 0.0 %
0.0 %
C13 0.0 %
0.0 %
C23 0.0 %
100.0 %
C24 0.0 %
100.0 %
C25 0.0 %
100.0 %
C28 0.0 %
100.0 %

Tracking by satellite elevation > 15°: 
Elevation Cycle Slips GPS Cycle Slips GLONASS Cycle Slips Galileo Cycle Slips BeiDou Cycle Slips QZSS Cycle Slips NavIC Observations
85 - 90 0
0
0
0
0
0
0.9 %
80 - 85 0
0
0
0
0
0
4.4 %
75 - 80 0
0
0
0
0
0
8.0 %
70 - 75 0
0
0
0
0
0
5.7 %
65 - 70 0
0
0
0
0
0
7.8 %
60 - 65 0
0
0
0
0
0
7.9 %
55 - 60 0
0
0
0
0
0
6.2 %
50 - 55 0
0
0
0
0
0
3.8 %
45 - 50 0
0
0
0
0
0
4.2 %
40 - 45 0
0
0
0
0
0
6.1 %
35 - 40 0
0
0
0
0
0
7.0 %
30 - 35 0
0
1
0
0
0
8.4 %
25 - 30 0
0
0
0
0
0
9.0 %
20 - 25 1
2
0
0
0
0
9.9 %
15 - 20 0
0
0
0
0
0
10.8 %
10 - 15 0
0
0
0
0
0
0.0 %
5 - 10 0
0
0
0
0
0
0.0 %
0 - 5 0
0
0
0
0
0
0.0 %

Signal to Noise Ratio by satellite > 15°: 
SV GPS L1 L2 L5
G16 46.1
43.8
-
G18 51.4
55.1
58.0
G23 40.7
44.2
47.2
G25 39.7
43.0
47.0
G26 52.4
53.7
57.0
G27 42.6
46.1
49.4
G29 43.8
44.4
-
G31 50.8
50.6
-
Average GPS: 46.0
47.6
51.7

SV GLONASS G1 G2
R12 54.7
51.5
R13 37.8
40.8
R21 44.3
43.4
R22 43.6
38.7
R23 48.4
-
Average GLONASS: 45.7
43.6

SV Galileo E1 E5a E5b E5a+b
E11 49.0
49.8
49.8
53.1
E12 50.1
52.4
52.8
55.9
E24 54.6
56.0
56.3
59.4
E25 48.0
50.4
50.4
53.7
E31 46.0
48.8
48.6
52.0
E33 41.8
45.2
45.2
48.5
Average Galileo: 48.3
50.4
50.5
53.8

SV BeiDou B1I B2I
C11 52.1
55.2
C12 41.4
47.7
C13 37.4
39.5
C23 51.4
-
C24 42.2
-
C25 53.2
-
C28 42.4
-
Average BeiDou: 45.7
47.5

Code multipath by satellite > 15°: 
SV GPS Av Elev MP (L1) MP (L2) MP (L5)
G16 37.3 ° 0.08 m
0.10 m
-
G18 63.6 ° 0.06 m
0.04 m
0.08 m
G23 18.0 ° 0.13 m
0.16 m
0.23 m
G25 19.0 ° 0.16 m
0.09 m
0.27 m
G26 64.7 ° 0.04 m
0.03 m
0.05 m
G27 23.2 ° 0.06 m
0.06 m
0.07 m
G29 28.2 ° 0.10 m
0.10 m
-
G31 54.5 ° 0.09 m
0.05 m
-
Average GPS: - 0.09 m
0.08 m
0.14 m

SV GLONASS Av Elev MP (G1) MP (G2)
R12 76.2 ° 0.04 m
0.05 m
R13 33.9 ° 0.16 m
0.16 m
R21 25.5 ° 0.16 m
0.13 m
R22 69.3 ° 0.07 m
0.05 m
R23 - - -
Average GLONASS: - 0.11 m
0.10 m

SV Galileo Av Elev MP (E1) MP (E5a) MP (E5b) MP (E5a+b)
E11 51.7 ° 0.08 m
0.09 m
0.09 m
0.06 m
E12 64.6 ° 0.04 m
0.06 m
0.06 m
0.03 m
E24 76.2 ° 0.03 m
0.04 m
0.04 m
0.01 m
E25 37.0 ° 0.07 m
0.14 m
0.12 m
0.04 m
E31 31.7 ° 0.09 m
0.19 m
0.19 m
0.08 m
E33 20.3 ° 0.10 m
0.17 m
0.15 m
0.04 m
Average Galileo: - 0.07 m
0.11 m
0.11 m
0.04 m

SV BeiDou Av Elev MP (B1I) MP (B2I)
C11 75.2 ° 0.13 m
0.07 m
C12 28.6 ° 0.08 m
0.10 m
C13 16.3 ° 0.17 m
0.19 m
C23 50.6 ° 0.06 m
-
C24 20.4 ° 1.07 m
-
C25 67.9 ° 0.49 m
-
C28 19.6 ° 0.20 m
-
Average BeiDou: - 0.31 m
0.12 m

Code multipath by satellite elevation > 15°: 
Elevation MP (L1/E1/B1I) MP (L2/B1C) MP (L5/E5a/B2a) MP (E5b/B2I) MP (E5a+b/B2a+b) MP (L6/E6/B3I/G2a) MP (G3)
85 - 90 0.03 m
0.05 m
- - - - -
80 - 85 0.14 m
0.05 m
- 0.07 m
- - -
75 - 80 0.11 m
0.04 m
0.04 m
0.04 m
0.01 m
- -
70 - 75 0.10 m
0.04 m
0.04 m
0.05 m
0.03 m
- -
65 - 70 0.07 m
0.05 m
0.07 m
0.07 m
0.03 m
- -
60 - 65 0.10 m
0.04 m
0.07 m
0.06 m
0.03 m
- -
55 - 60 0.16 m
0.05 m
0.08 m
0.10 m
0.06 m
- -
50 - 55 0.05 m
0.05 m
0.06 m
0.06 m
0.03 m
- -
45 - 50 0.07 m
0.07 m
0.06 m
0.08 m
0.04 m
- -
40 - 45 0.08 m
0.12 m
0.12 m
0.09 m
0.06 m
- -
35 - 40 0.07 m
0.10 m
0.17 m
0.14 m
0.06 m
- -
30 - 35 0.09 m
0.10 m
0.19 m
0.15 m
0.08 m
- -
25 - 30 0.15 m
0.09 m
0.11 m
0.15 m
0.06 m
- -
20 - 25 0.23 m
0.12 m
0.15 m
0.15 m
0.03 m
- -
15 - 20 0.23 m
0.12 m
0.19 m
0.17 m
0.04 m
- -
10 - 15 - - - - - - -
5 - 10 - - - - - - -
0 - 5 - - - - - - -


Observation File Messages:





GPS Navigation File Messages:




GLONASS Navigation File Messages:




Galileo Navigation File Messages:




BeiDou Navigation File Messages:




General Messages:


- Orbit missing or expired for SV C8 starting 2021/06/07 10:00:00.00.
- Updated header information or comments after epoch 2021/06/07 10:59:59.00

Notes:


(*)  Signal strength is mapped between 1 (worst) and 9 (best), 5 is the threshold for good SNR, 0 indicates value is unknown 
(#)  A complete GPS observation contains non-zero L1 code and phase measurements with a SNR of at least 0 
(#)  A complete GLONASS observation contains non-zero G1 code and phase measurements with a SNR of at least 0 
(#)  A complete Galileo observation contains non-zero E1, E5a code and phase measurements with a SNR of at least 0 
(#)  A complete BeiDou observation contains non-zero B1I code and phase measurements with a SNR of at least 0 
(#)  A complete QZSS observation contains non-zero L1 code and phase measurements with a SNR of at least 0 
(#)  A complete NavIC observation contains non-zero L5 code and phase measurements with a SNR of at least 0 
(-)  The minimum duration of a data gap to be reported is 5 seconds 
(^)  A satellite has to be above the elevation mask with no observations recorded for at least 120 seconds to be reported 
The elevation mask is set at 15° 
Abbreviations: Av=Average, IOD=Ionospheric delay, Num=Number, Obs=Observations, MP=Multipath, SV=Satellite vehicle, Elev=Elevation, Nav=Navigation data (ephemeris), WLF=Wavelength factor  
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