<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 16:20:00.000"
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="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.02.06 (037) 16:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603702061620009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.297" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.825" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" Name="h`F2" 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="7.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.331" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.332" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="403.206" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="249.395" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.855" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="198.419" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.851" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="110.362" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="240.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="88">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 295.000 300.000 305.000 310.000 315.000 320.000 325.000 330.000 330.000 335.000 340.000 340.000 342.500 345.000 347.500 350.000 352.500 355.000 357.500 360.000 363.333 366.667 370.000 373.333 376.667 380.000 385.000 385.000 390.000 395.000 395.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 465.000 465.000 475.000 480.000 485.000 485.000 490.000 495.000 505.000 510.000 510.000 515.000 520.000 525.000 540.000 545.000 550.000 550.000 555.000 560.000 565.000 575.000 580.000 585.000 590.000 595.000 605.000 610.000 615.000 626.667 638.333 650.000 665.000 680.000 710.000 742.024 785.315
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 48 48 48 45 45 45 48 48 48 48 0 0 0 0 0 48 0 45 0 48 0 48 0 48 51 51 51 51 51 45 54 48 57 51 51 60 57 54 60 57 63 57 54 54 57 54 54 57 57 57 54 54 54 57 54 57 48 51 60 60 57 57 45 45 51 57 54 54 57 57 57 57 54 51 48 48 45 45 48 48 45 45 45 45 45
</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 1.953125 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -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
</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" >
89.492 90.0 95.0 100.0 105.0 110.0 111.796 113.591 115.0 115.387 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 403.206 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.241 2.883 3.223 3.331 3.208 3.208 3.304 3.331 3.447 3.568 3.688 3.807 3.926 4.045 4.167 4.289 4.413 4.539 4.666 4.794 4.924 5.055 5.186 5.318 5.45 5.582 5.713 5.844 5.974 6.104 6.232 6.359 6.485 6.609 6.732 6.854 6.975 7.094 7.212 7.328 7.443 7.557 7.67 7.781 7.891 8.0 8.107 8.213 8.317 8.42 8.521 8.621 8.718 8.812 8.904 8.993 9.078 9.158 9.233 9.301 9.361 9.413 9.453 9.482 9.497 9.5 9.5 9.497 9.49 9.479 9.465 9.448 9.428 9.404 9.378 9.348 9.316 9.281 9.244 9.204 9.162 9.117 9.071 9.022 8.972 8.919 8.865 8.809 8.752 8.693 8.633 8.571 8.508 8.445 8.38 8.314 8.247 8.179 8.11 8.041 7.971 7.901 7.83 7.758 7.686 7.614 7.542 7.469 7.396 7.322 7.249 7.176 7.102 7.029 6.955 6.882 6.809 6.735 6.662 6.59 6.517 6.445 6.373 6.301 6.229 6.158 6.087 6.017 5.947 5.877 5.808 5.74 5.671 5.603 5.536 5.469 5.403 5.337 5.272 5.207 5.143 5.079 5.016 4.954 4.892 4.83 4.769 4.709 4.649 4.59 4.532 4.474 4.416 4.359 4.303 4.248 4.192 4.138 4.084 4.031 3.978 3.926 3.874 3.823 3.773 3.723 3.674 3.625 3.577 3.529 3.482 3.436 3.39 3.345 3.3 3.256 3.212 3.169 3.126 3.084 3.042 3.001 2.96 2.92 2.881 2.842

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.331" PeakHeight="110.0" Num="3" Error="0.0">
-30.458 13.088 -3.138
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.331" EndFrequency="9.5" PeakHeight="403.206" Num="5" zHalfNm="249.395" Error="2.772">
-260.533 -41.546 19.531 -7.376 2.105
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.387" Depth="0.123"/>
<TopsideChapman PeakHeight="403.206" PeakDensity="1119727.0" PeakScaleHeight="110.362" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
