<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-03 -062 08:40:00.000"
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: 75%</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" >
2026.03.03 (062) 08:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606203030840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="4.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.331" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="13.658" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.400" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" 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="3.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="315.574" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.616" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="279.428" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="235.603" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.484" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.000" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="62.504" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.967" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="33.894" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="56.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.060" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="27">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 255.000 257.500 260.000 262.500 265.000 265.000 265.000 269.286 273.571 277.857 282.143 286.429 290.714 295.000 290.000 295.000 300.000 300.000 305.000 309.610 315.574 323.594 334.952 352.281 381.970 444.568
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
78 72 0 0 0 75 0 75 0 0 0 0 0 48 57 72 72 75 63 51 72 57 57 0 63 57 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 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 123.333 121.667 120.000 115.000 117.500 120.000 125.000 130.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 60 69 66 60 57 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 -0.390625 -1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875
</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" >
91.041 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.291 140.0 145.0 150.0 155.0 160.0 162.582 165.0 170.0 175.0 180.0 185.0 188.873 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 279.428 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.408 0.534 0.596 0.616 0.607 0.581 0.533 0.459 0.337 0.291 0.291 0.291 0.291 0.291 0.291 0.291 0.321 0.383 0.445 0.506 0.568 0.616 0.641 0.782 0.963 1.168 1.392 1.638 1.911 2.213 2.537 2.861 3.159 3.412 3.617 3.779 3.902 3.993 4.055 4.09 4.1 4.1 4.09 4.064 4.024 3.972 3.909 3.837 3.757 3.67 3.579 3.483 3.384 3.283 3.181 3.078 2.975 2.872 2.77 2.669 2.57 2.473 2.378 2.285 2.195 2.107 2.022 1.939 1.859 1.782 1.707 1.635 1.566 1.499 1.435 1.373 1.313 1.256 1.202 1.149 1.099 1.051 1.004 0.96 0.918 0.877 0.838 0.801 0.765 0.731 0.699 0.668 0.638 0.609 0.582 0.556 0.531 0.507 0.485 0.463 0.442 0.422 0.403 0.385 0.368 0.351 0.336 0.32 0.306 0.292 0.279 0.267 0.255 0.243 0.232 0.222 0.212 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.616" PeakHeight="110.0" Num="3" Error="0.0">
-23.849 5.503 -0.613
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.616" EndFrequency="4.1" PeakHeight="279.428" Num="5" zHalfNm="235.603" Error="1.754">
-99.001 13.913 -7.614 3.23 -1.083
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="78.873" Depth="0.325"/>
<TopsideChapman PeakHeight="279.428" PeakDensity="208560.8" PeakScaleHeight="33.894" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
