<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-03 -062 08:00:00.000"
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) 08:00:00</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">
FF202606203030800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="4.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.270" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.368" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.150" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.150" 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="4.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="330.000" 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="2.850" 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="293.844" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.342" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.352" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.900" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="61.651" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.778" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="33.571" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="51.020" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.210" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="2.850" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="38">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 257.500 260.000 260.000 265.000 266.250 267.500 268.750 270.000 270.000 270.000 270.000 275.000 275.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 290.000 295.000 295.000 295.000 300.000 300.000 305.000 310.000 315.000 320.000 325.000 330.000 339.432 351.966 369.432 395.456 438.365
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 69 63 63 0 0 0 72 72 72 66 66 69 60 0 69 72 66 66 63 0 63 60 66 66 69 57 63 75 69 69 69 60 63 57 0 54
</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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="46">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.9 1.95 2.0 2.05 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 115.000 125.000 130.000 125.000 125.000 130.000 135.000 127.500 120.000 120.000 120.000 120.000 115.000 115.000 115.000 115.000 115.000 115.000 105.000 107.500 110.000 110.000 109.167 108.333 107.500 106.667 105.833 105.000 110.000 115.000 120.000 120.000 120.000 117.500 115.000 115.000 113.571 112.143 110.714 109.286 107.857 106.429 105.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 66 69 66 60 0 63 0 54 0 63 60 0 63 66 0 0 63 0 66 75 0 72 72 0 0 0 0 0 72 0 0 57 51 60 0 51 0 0 0 0 0 0 0 57 60
</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 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 -0.390625 1.171875 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 -1.171875 -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="124">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.299 145.0 150.0 155.0 160.0 165.0 170.0 172.597 175.0 180.0 185.0 190.0 195.0 200.0 203.896 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 293.844 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.301 0.266 0.216 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.236 0.261 0.286 0.31 0.335 0.354 0.376 0.509 0.682 0.882 1.116 1.403 1.771 2.246 2.794 3.293 3.683 3.978 4.203 4.374 4.502 4.596 4.658 4.692 4.7 4.699 4.685 4.653 4.605 4.542 4.468 4.382 4.289 4.187 4.08 3.969 3.854 3.736 3.618 3.498 3.379 3.26 3.143 3.027 2.913 2.801 2.692 2.585 2.481 2.381 2.283 2.188 2.097 2.009 1.924 1.841 1.762 1.686 1.613 1.543 1.475 1.411 1.349 1.289 1.232 1.177 1.125 1.075 1.027 0.981 0.937 0.895 0.855 0.816 0.78 0.745 0.711 0.679 0.648 0.619 0.591 0.564 0.539 0.514 0.491 0.469 0.448 0.427 0.408 0.389 0.372 0.355 0.339 0.323 0.309 0.295 0.281 0.268 0.256 0.245 0.234 0.223 0.213 0.203

</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="4.7" PeakHeight="293.844" Num="5" zHalfNm="250.342" Error="1.418">
-105.193 24.632 -13.882 6.082 -1.587
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.896" Depth="0.154"/>
<TopsideChapman PeakHeight="293.844" PeakDensity="274069.47" PeakScaleHeight="33.571" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
