<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 08:30:00.000"
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 F2o 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" >
2026.03.15 (074) 08:30:00</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">
FF202607403150830009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.302" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.347" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.350" 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="4.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="322.375" 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="0.508" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="286.093" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="236.517" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.158" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.156" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.765" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.306" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="53.850" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.520" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="48">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.000 245.000 245.000 250.000 248.750 247.500 246.250 245.000 250.000 250.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 270.000 270.000 270.000 270.000 275.000 275.000 276.667 278.333 280.000 285.000 285.000 290.000 290.000 295.000 300.000 305.000 310.000 315.575 322.375 330.855 341.724 356.158 376.254 406.158 455.366
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 75 0 0 81 72 0 63 0 0 81 84 81 84 81 72 78 87 87 84 60 81 72 72 51 72 72 75 0 0 72 78 72 78 78 72 72 78 78 78 81 72 78 75 72 72 63
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="135">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.591 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 137.82 140.0 145.0 150.0 155.0 160.0 165.0 165.639 170.0 175.0 180.0 185.0 190.0 193.459 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 286.093 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.336 0.44 0.492 0.508 0.501 0.48 0.443 0.386 0.295 0.215 0.215 0.215 0.215 0.215 0.215 0.215 0.215 0.261 0.314 0.366 0.419 0.472 0.508 0.555 0.719 0.902 1.117 1.383 1.731 2.211 2.81 3.36 3.776 4.086 4.322 4.505 4.648 4.758 4.84 4.899 4.935 4.95 4.95 4.945 4.925 4.891 4.845 4.787 4.719 4.642 4.558 4.468 4.372 4.272 4.169 4.062 3.954 3.845 3.735 3.624 3.514 3.405 3.297 3.19 3.084 2.981 2.879 2.78 2.682 2.588 2.495 2.405 2.318 2.233 2.15 2.07 1.993 1.918 1.846 1.776 1.708 1.643 1.58 1.519 1.46 1.404 1.349 1.297 1.246 1.197 1.151 1.105 1.062 1.02 0.98 0.941 0.904 0.869 0.834 0.801 0.77 0.739 0.71 0.682 0.654 0.628 0.604 0.58 0.556 0.534 0.513 0.493 0.473 0.454 0.436 0.419 0.402 0.386 0.371 0.356 0.342 0.328 0.315 0.302 0.29 0.279 0.268 0.257 0.247 0.237 0.227 0.218 0.209 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.508" PeakHeight="110.0" Num="3" Error="0.0">
-22.433 4.437 -0.413
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.508" EndFrequency="4.95" PeakHeight="286.093" Num="5" zHalfNm="236.517" Error="1.224">
-111.717 30.47 -16.45 5.961 -0.898
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="83.459" Depth="0.293"/>
<TopsideChapman PeakHeight="286.093" PeakDensity="304001.25" PeakScaleHeight="38.306" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
