<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 09:10:00.000"
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" >
2026.03.22 (081) 09:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608103220910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.455" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.520" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.050" 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="5.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="295.867" 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="1.288" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="255.874" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="213.553" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.530" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="60.108" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.855" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="33.758" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="64.060" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.140" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="61">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 5.5 5.55 5.6 5.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 250.000 250.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 247.500 250.000 251.667 253.333 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 275.000 275.000 275.000 277.500 280.000 280.000 285.000 285.000 285.000 290.000 292.631 295.867 299.946 305.246 312.409 322.631 338.400 365.914 426.084
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 63 72 60 69 69 69 69 63 54 63 63 63 0 63 72 63 60 72 0 0 66 66 66 69 69 60 0 72 75 0 75 63 0 72 69 69 57 63 69 57 63 66 0 57 66 60 0 66 63 60 57 63 60 60 57 0 0 0
</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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="121">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.045 95.0 100.0 105.0 110.0 115.0 120.0 122.994 125.0 130.0 135.0 135.987 140.0 145.0 148.981 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 255.874 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.86 1.116 1.247 1.288 1.265 1.196 1.129 1.129 1.129 1.129 1.129 1.178 1.239 1.288 1.326 1.516 1.698 1.874 2.047 2.221 2.399 2.585 2.781 2.993 3.225 3.482 3.77 4.091 4.434 4.768 5.056 5.281 5.445 5.557 5.623 5.649 5.65 5.642 5.612 5.562 5.494 5.411 5.315 5.207 5.089 4.964 4.833 4.698 4.559 4.417 4.275 4.132 3.989 3.848 3.708 3.571 3.436 3.304 3.175 3.049 2.926 2.808 2.693 2.581 2.474 2.37 2.27 2.173 2.08 1.99 1.904 1.822 1.743 1.666 1.593 1.523 1.456 1.392 1.33 1.271 1.215 1.161 1.109 1.059 1.012 0.967 0.924 0.882 0.843 0.805 0.769 0.734 0.701 0.67 0.639 0.611 0.583 0.557 0.532 0.508 0.485 0.463 0.442 0.422 0.403 0.385 0.368 0.351 0.335 0.32 0.305 0.292 0.278 0.266 0.254 0.242 0.231 0.221 0.211 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.288" PeakHeight="110.0" Num="3" Error="0.0">
-27.561 9.198 -1.592
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.288" EndFrequency="5.65" PeakHeight="255.874" Num="5" zHalfNm="213.553" Error="2.411">
-99.456 -6.779 -4.762 5.521 -1.417
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="38.981" Depth="0.159"/>
<TopsideChapman PeakHeight="255.874" PeakDensity="396060.78" PeakScaleHeight="33.758" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
