<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 17:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.01.29 (029) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202602901291740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.243" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.537" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.250" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.310" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="115.323" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="590.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.127" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.236" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="420.483" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="267.560" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.212" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="196.941" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.930" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="109.159" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="244.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.420" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="100">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 287.500 290.000 290.000 295.000 300.000 304.444 308.889 313.333 317.778 322.222 326.667 331.111 335.556 340.000 347.500 355.000 350.000 360.000 365.000 367.500 370.000 375.000 375.000 379.167 383.333 387.500 391.667 395.833 400.000 400.000 400.000 407.500 415.000 415.000 415.000 420.000 425.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 480.000 480.000 485.000 485.000 490.000 495.000 500.000 500.000 505.000 515.000 515.000 520.000 525.000 530.000 535.000 540.000 540.000 550.000 555.000 560.000 565.000 565.000 570.000 575.000 580.000 585.000 590.000 590.000 595.000 605.000 610.000 620.000 625.000 633.313 642.537 652.831 664.392 677.470 692.383 709.548 729.516 753.036 781.146
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 54 51 51 48 0 0 0 0 0 45 45 0 54 0 48 60 57 51 0 51 54 0 0 0 0 54 0 63 60 51 0 51 60 60 57 54 63 60 63 57 60 57 60 54 60 54 57 60 63 63 57 63 63 63 60 57 69 66 66 66 66 69 69 63 63 60 63 63 63 66 63 63 63 60 60 54 63 66 63 60 57 54 57 57 57 54 54 54 57 54 51 51 54 51 54 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 1.953125 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 2.734375 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.25 3.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.323 119.087
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.495 90.0 95.0 100.0 105.0 110.0 112.657 115.0 115.315 117.972 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 420.483 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.227 2.865 3.202 3.31 3.181 3.181 3.181 3.31 3.36 3.48 3.6 3.72 3.84 3.962 4.084 4.208 4.334 4.46 4.588 4.717 4.847 4.978 5.11 5.242 5.374 5.506 5.638 5.769 5.901 6.031 6.161 6.289 6.417 6.545 6.671 6.796 6.92 7.044 7.166 7.287 7.408 7.528 7.647 7.764 7.882 7.998 8.113 8.228 8.342 8.455 8.567 8.678 8.788 8.898 9.005 9.112 9.216 9.319 9.419 9.515 9.608 9.696 9.779 9.853 9.918 9.973 10.014 10.04 10.05 10.05 10.048 10.043 10.033 10.02 10.003 9.982 9.958 9.931 9.901 9.868 9.831 9.792 9.75 9.706 9.659 9.61 9.559 9.505 9.449 9.392 9.333 9.272 9.209 9.145 9.079 9.012 8.944 8.875 8.805 8.733 8.661 8.588 8.514 8.439 8.364 8.288 8.211 8.134 8.057 7.979 7.901 7.823 7.745 7.667 7.588 7.509 7.431 7.352 7.274 7.195 7.117 7.039 6.961 6.884 6.806 6.729 6.653 6.576 6.5 6.425 6.349 6.275 6.2 6.126 6.053 5.98 5.908 5.836 5.765 5.694 5.624 5.554 5.485 5.416 5.349 5.281 5.215 5.149 5.083 5.018 4.954 4.89 4.827 4.765 4.703 4.642 4.582 4.522 4.463 4.404 4.346 4.289 4.232 4.176 4.121 4.066 4.012 3.958 3.906 3.853 3.802 3.751 3.7 3.65 3.601 3.552 3.504 3.457 3.41 3.363 3.317 3.272 3.228 3.184 3.14 3.097

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.31" PeakHeight="110.0" Num="3" Error="0.0">
-30.443 13.065 -3.127
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.31" EndFrequency="10.05" PeakHeight="420.483" Num="5" zHalfNm="267.56" Error="3.961">
-268.412 -51.911 24.18 -8.263 1.895
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.972" Depth="0.129"/>
<TopsideChapman PeakHeight="420.483" PeakDensity="1253132.8" PeakScaleHeight="109.159" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
