<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 09:50:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.03.13 (072) 09:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607203130950009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.370" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.475" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.800" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="321.153" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.986" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="261.052" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="214.814" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.816" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="65.033" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.031" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.218" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="63.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="109">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 245.000 247.500 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 252.500 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 257.500 260.000 260.000 260.000 260.000 262.500 265.000 265.000 267.500 270.000 270.000 271.000 272.000 273.000 274.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 295.000 295.000 300.000 300.000 305.000 305.000 310.000 310.000 315.000 317.776 321.153 325.350 330.705 337.776 347.545 361.918 385.157 429.121
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 57 57 60 60 60 66 72 75 75 78 78 75 0 72 69 60 60 54 0 0 63 66 66 0 69 69 63 0 48 0 57 54 51 63 60 57 45 0 63 57 0 69 66 66 66 63 63 54 0 63 63 66 69 66 66 60 57 0 66 0 69 66 0 57 60 0 51 57 0 0 45 0 54 60 63 0 63 51 57 60 63 66 57 63 66 69 63 69 69 66 69 66 72 66 69 66 69 72 69 69 66 69 66 69 66 63 51
</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 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 1.171875 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 -1.171875 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="138">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.764 90.0 95.0 100.0 105.0 110.0 115.0 118.288 120.0 125.0 126.576 130.0 134.864 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 261.052 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.22 1.331 1.72 1.922 1.986 1.938 1.853 1.853 1.853 1.853 1.908 1.986 1.993 2.195 2.357 2.51 2.661 2.816 2.979 3.152 3.339 3.545 3.774 4.033 4.33 4.673 5.069 5.515 5.993 6.471 6.919 7.315 7.653 7.931 8.149 8.308 8.407 8.449 8.45 8.44 8.402 8.338 8.249 8.14 8.012 7.869 7.712 7.544 7.367 7.182 6.992 6.797 6.6 6.402 6.203 6.004 5.806 5.611 5.418 5.228 5.042 4.86 4.682 4.508 4.339 4.174 4.014 3.859 3.709 3.564 3.423 3.287 3.156 3.03 2.908 2.79 2.677 2.568 2.463 2.362 2.265 2.172 2.083 1.996 1.914 1.834 1.758 1.685 1.615 1.548 1.483 1.421 1.362 1.305 1.25 1.198 1.148 1.099 1.053 1.009 0.967 0.926 0.887 0.85 0.814 0.78 0.747 0.715 0.685 0.656 0.629 0.602 0.577 0.553 0.529 0.507 0.486 0.465 0.445 0.427 0.409 0.391 0.375 0.359 0.344 0.329 0.316 0.302 0.289 0.277 0.266 0.254 0.244 0.233 0.223 0.214 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.986" PeakHeight="110.0" Num="3" Error="0.0">
-29.048 11.089 -2.277
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.986" EndFrequency="8.45" PeakHeight="261.052" Num="5" zHalfNm="214.814" Error="3.276">
-108.028 -14.91 -7.719 3.053 1.416
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="24.864" Depth="0.133"/>
<TopsideChapman PeakHeight="261.052" PeakDensity="885887.1" PeakScaleHeight="36.218" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
