<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 11:40:00.000"
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="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" >
2026.02.01 (032) 11:40:00</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">
FF202603202011140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.641" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.164" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.000" 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="2.873" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="342.289" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="225.494" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.108" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="153.184" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.008" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.097" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="177.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.580" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="94">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 250.000 250.000 252.500 255.000 257.500 260.000 262.500 265.000 267.500 270.000 265.000 267.500 270.000 272.500 275.000 280.000 280.000 285.000 290.000 290.000 295.000 295.000 295.000 295.000 300.000 300.000 303.750 307.500 311.250 315.000 315.000 318.000 321.000 324.000 327.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 420.000 435.000 440.000 440.000 445.000 460.000 465.000 465.000 475.000 480.000 490.000 495.000 505.000 510.000 515.000 522.509 530.869 540.234 550.796 562.801 576.566 592.509 611.191
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 48 0 0 0 0 0 0 0 48 0 0 51 0 0 57 54 0 54 60 54 0 0 0 60 0 0 63 0 60 60 0 0 60 0 57 63 57 60 54 63 63 60 63 60 63 66 63 51 60 63 57 63 60 66 63 66 60 66 60 66 63 60 66 63 63 66 66 66 66 66 54 54 66 63 54 54 66 60 48 60 60 63 54 57 60 57 51 51 0 51 42 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 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 1.953125 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" >
89.568 90.0 95.0 100.0 105.0 110.0 113.793 115.0 117.585 120.0 121.378 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 342.289 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.931 2.487 2.78 2.873 2.751 2.751 2.751 2.829 2.873 2.985 3.134 3.281 3.43 3.583 3.741 3.906 4.078 4.257 4.442 4.631 4.823 5.016 5.208 5.399 5.585 5.768 5.946 6.12 6.289 6.454 6.614 6.771 6.924 7.073 7.219 7.362 7.503 7.64 7.775 7.907 8.037 8.164 8.288 8.409 8.527 8.64 8.747 8.847 8.937 9.016 9.08 9.125 9.147 9.15 9.149 9.142 9.13 9.111 9.087 9.058 9.023 8.984 8.94 8.891 8.839 8.783 8.723 8.659 8.593 8.523 8.451 8.376 8.299 8.22 8.138 8.055 7.97 7.884 7.796 7.707 7.617 7.526 7.435 7.342 7.249 7.156 7.062 6.969 6.875 6.781 6.687 6.593 6.499 6.406 6.313 6.22 6.128 6.036 5.945 5.855 5.765 5.675 5.587 5.499 5.412 5.326 5.241 5.156 5.073 4.99 4.908 4.828 4.748 4.669 4.591 4.514 4.438 4.363 4.289 4.216 4.144 4.073 4.003 3.934 3.866 3.798 3.732 3.667 3.603 3.54 3.478 3.417 3.356 3.297 3.238 3.181 3.124 3.069 3.014 2.96 2.907 2.855 2.804 2.753 2.704 2.655 2.607 2.56 2.514 2.468 2.423 2.379 2.336 2.294 2.252 2.211 2.171 2.131 2.092 2.054 2.016 1.979 1.943 1.908 1.873 1.838 1.805 1.771 1.739 1.707 1.676 1.645 1.614 1.585 1.555 1.527 1.499 1.471 1.444 1.417 1.391 1.365 1.34 1.315 1.291 1.267

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.873" PeakHeight="110.0" Num="3" Error="0.0">
-30.086 12.543 -2.889
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.873" EndFrequency="9.15" PeakHeight="342.289" Num="5" zHalfNm="225.494" Error="4.778">
-204.167 -27.39 16.982 -9.124 2.788
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.378" Depth="0.122"/>
<TopsideChapman PeakHeight="342.289" PeakDensity="1038740.7" PeakScaleHeight="83.097" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
