<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-24 -083 08:50:00.000"
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: 100%</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" >
2026.03.24 (083) 08:50:00</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">
FF202608303240850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="4.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.289" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.292" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="1.950" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="95.000" Name="h`Es" 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="4.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="322.431" 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="0.861" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="280.524" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="224.809" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.826" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.450" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="79.212" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.833" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="42.917" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="70.360" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="45">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 242.500 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 260.000 260.000 260.000 265.000 265.000 265.000 270.000 270.000 270.000 275.000 275.000 280.000 280.000 285.000 290.000 290.000 295.000 295.000 300.000 303.131 306.774 311.065 316.194 322.431 330.182 340.073 353.131 371.169 397.705 440.596
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 69 72 0 0 0 0 0 0 0 72 84 0 81 72 81 87 75 81 87 81 87 87 84 87 81 84 78 69 72 69 69 69 75 75 75 75 72 72 66 66 66 57 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 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="11">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
95.000 95.000 96.250 97.500 98.750 100.000 95.000 96.667 98.333 100.000 100.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 66 0 0 0 0 0 0 0 0 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="143">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.448 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 131.295 135.0 140.0 145.0 150.0 152.591 155.0 160.0 165.0 170.0 173.886 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 280.524 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.573 0.746 0.834 0.861 0.847 0.804 0.727 0.603 0.559 0.559 0.559 0.559 0.559 0.559 0.593 0.664 0.735 0.806 0.861 0.888 1.023 1.185 1.371 1.582 1.82 2.086 2.378 2.689 3.002 3.299 3.567 3.8 3.997 4.162 4.299 4.41 4.497 4.564 4.611 4.639 4.65 4.65 4.645 4.629 4.602 4.566 4.52 4.467 4.407 4.341 4.269 4.193 4.113 4.029 3.943 3.854 3.764 3.673 3.581 3.489 3.396 3.304 3.212 3.121 3.031 2.942 2.854 2.768 2.684 2.6 2.519 2.439 2.362 2.286 2.211 2.139 2.069 2.0 1.934 1.869 1.806 1.745 1.686 1.629 1.573 1.519 1.467 1.417 1.368 1.32 1.274 1.23 1.187 1.146 1.106 1.067 1.03 0.993 0.958 0.925 0.892 0.861 0.83 0.801 0.773 0.745 0.719 0.693 0.669 0.645 0.622 0.6 0.579 0.558 0.538 0.519 0.501 0.483 0.466 0.449 0.433 0.418 0.403 0.388 0.374 0.361 0.348 0.336 0.324 0.312 0.301 0.29 0.28 0.27 0.26 0.251 0.242 0.233 0.225 0.217 0.209 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.861" PeakHeight="110.0" Num="3" Error="0.0">
-25.796 7.27 -1.026
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.861" EndFrequency="4.65" PeakHeight="280.524" Num="5" zHalfNm="224.809" Error="1.197">
-117.881 18.597 -9.467 2.695 -0.582
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="63.886" Depth="0.302"/>
<TopsideChapman PeakHeight="280.524" PeakDensity="268269.22" PeakScaleHeight="42.917" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
