<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 07:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Trace overlaps while constructing baseline</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) 07:50:00</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">
FF202607203130750009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.228" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.595" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="5.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="325.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="305.364" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="266.462" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.160" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="55.941" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.565" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.536" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="53.160" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.470" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="68">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 265.000 265.000 265.000 265.000 265.000 270.000 265.000 270.000 275.000 280.000 285.000 284.167 283.333 282.500 281.667 280.833 280.000 280.000 280.000 280.000 282.500 285.000 285.000 285.000 287.500 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 296.250 297.500 298.750 300.000 300.000 299.286 298.571 297.857 297.143 296.429 295.714 295.000 295.000 295.000 295.000 297.143 299.286 301.429 303.571 305.714 307.857 310.000 315.000 320.000 320.000 325.000 340.000 365.000 366.298 368.092 370.731 375.000 383.079 404.186
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 63 66 0 0 57 63 57 0 0 54 51 0 0 0 0 0 60 69 60 69 54 60 66 75 0 60 0 0 69 66 0 66 57 0 0 54 60 60 0 0 69 69 0 69 69 69 66 0 0 0 0 0 0 0 66 60 0 0 66 60 51 48 60 51 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 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 1.171875 -2.734375 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.171875 0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="119">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.925 145.0 150.0 155.0 160.0 165.0 170.0 173.849 175.0 180.0 185.0 190.0 195.0 200.0 205.0 205.774 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 305.364 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.326 0.303 0.27 0.223 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.23 0.254 0.278 0.302 0.326 0.35 0.354 0.443 0.581 0.751 0.951 1.183 1.449 1.754 2.099 2.482 2.895 3.32 3.736 4.125 4.472 4.769 5.013 5.202 5.338 5.42 5.45 5.45 5.437 5.397 5.333 5.248 5.145 5.028 4.898 4.759 4.613 4.462 4.307 4.15 3.992 3.835 3.68 3.527 3.376 3.229 3.086 2.947 2.812 2.682 2.556 2.435 2.319 2.207 2.1 1.998 1.9 1.806 1.717 1.632 1.55 1.473 1.399 1.328 1.261 1.197 1.137 1.079 1.024 0.972 0.923 0.875 0.831 0.788 0.748 0.71 0.673 0.639 0.606 0.575 0.545 0.517 0.491 0.466 0.442 0.419 0.397 0.377 0.358 0.339 0.322 0.305 0.289 0.275 0.26 0.247 0.234 0.222 0.211

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="5.45" PeakHeight="305.364" Num="5" zHalfNm="266.462" Error="2.56">
-104.619 7.969 -4.263 1.988 -0.665
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="95.774" Depth="0.154"/>
<TopsideChapman PeakHeight="305.364" PeakDensity="368517.38" PeakScaleHeight="29.536" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
