<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-16 -075 00:10:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.16 (075) 00:10:00</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">
FF202607503160010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.673" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.977" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="285.000" 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="2.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="286.249" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="277.399" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.435" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="14.147" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.527" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="10.583" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="23.490" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 275.000 280.000 285.000 291.667 298.333 305.000 304.744 304.487 304.231 303.974 303.718 303.462 303.205 302.949 302.692 302.436 302.179 301.923 301.667 301.410 301.154 300.897 300.641 300.385 300.128 299.872 299.615 299.359 299.103 298.846 298.590 298.333 298.077 297.821 297.564 297.308 297.051 296.795 296.538 296.282 296.026 295.769 295.513 295.256 295.000 294.744 294.487 294.231 293.974 293.718 293.462 293.205 292.949 292.692 292.436 292.179 291.923 291.667 291.410 291.154 290.897 290.641 290.385 290.128 289.872 289.615 289.359 289.103 288.846 288.590 288.333 288.077 287.821 287.564 287.308 287.051 286.795 286.538 286.282 286.026 285.769 285.513 285.256 285.000 295.000 305.723 332.800
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 51 60 0 63 60 60 0 0 60 0 66 0 0 60 0 57 0 0 0 0 0 0 0 0 0 0 54 0 0 0 0 0 0 0 0 0 0 60 54 0 54 0 0 0 57 0 0 0 0 0 0 57 0 54 60 0 0 54 0 0 0 0 0 0 0 51 57 0 0 0 0 0 0 0 51 0 0 0 0 0 0 0 51 51 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 -0.390625 1.171875 1.953125 0.390625 1.171875 2.734375 1.953125 1.171875 1.953125 1.171875 0.390625 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 0.390625 2.734375 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 1.171875 1.953125 -0.390625 1.953125 0.390625 1.953125 1.953125 0.390625 1.953125 -0.390625 0.390625 1.171875 1.171875 0.390625 -0.390625 0.390625 1.953125 -0.390625 -1.171875 0.390625 -0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 -1.953125 0.390625 1.171875 1.171875 -0.390625 1.171875 2.734375 0.390625 -0.390625 0.390625 -1.953125 1.171875 1.171875 1.953125 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="71">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.026 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.051 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.077 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 286.249 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.332 0.315 0.29 0.257 0.211 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.234 0.255 0.277 0.298 0.319 0.341 0.354 0.389 0.612 0.936 1.2 1.453 1.712 1.989 2.298 2.652 3.074 3.606 4.335 5.466 6.73 6.8 6.723 6.426 5.983 5.463 4.917 4.377 3.866 3.394 2.966 2.584 2.245 1.947 1.687 1.46 1.262 1.091 0.942 0.814 0.702 0.606 0.523 0.452 0.39 0.336 0.29 0.25 0.216

</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="6.8" PeakHeight="286.249" Num="5" zHalfNm="277.399" Error="4.372">
-50.741 -25.559 8.997 2.057 -2.926
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.077" Depth="0.154"/>
<TopsideChapman PeakHeight="286.249" PeakDensity="573697.25" PeakScaleHeight="10.583" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
