<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-02 -061 00:30:00.000"
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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.03.02 (061) 00:30:00</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">
FF202606103020030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.335" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.351" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="0.650" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="325.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="331.136" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="302.487" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.284" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="42.969" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.870" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="21.524" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="47.360" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="81">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 365.000 365.000 360.000 355.000 355.000 350.000 347.857 345.714 343.571 341.429 339.286 337.143 335.000 340.000 340.000 335.000 335.000 335.000 333.333 331.667 330.000 332.500 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 345.000 346.071 347.143 348.214 349.286 350.357 351.429 352.500 353.571 354.643 355.714 356.786 357.857 358.929 360.000 360.000 360.000 355.000 325.000 330.000 338.393 349.104 363.246 382.783 411.530 458.008
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 48 0 54 0 48 51 57 0 51 0 0 54 0 51 54 0 51 57 0 54 0 54 0 54 0 0 51 0 0 0 0 54 0 0 0 0 0 0 0 0 0 51 0 0 54 54 0 54 0 0 0 54 57 48 0 0 0 48 0 0 48 0 0 0 0 0 0 51 54 51 51 60 51 0 51 51 51 54 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 1.171875 -1.171875 1.171875 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 -2.734375 0.390625 0.390625 2.734375 0.390625 0.390625 -2.734375 1.171875 -0.390625 1.171875 -1.171875 -2.734375 1.171875 1.171875 1.953125 0.390625 -0.390625 1.171875 1.171875 0.390625 1.171875 1.171875 0.390625 1.953125 1.171875 1.171875 1.953125 1.171875 1.953125 1.953125 -0.390625 -1.953125 0.390625 0.390625 -2.734375 -2.734375 2.734375 -2.734375 -1.171875 -0.390625 0.390625 1.171875 0.390625 -1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 -1.171875 0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="111">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.287 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.573 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.86 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 331.136 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0
</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 0.333 0.315 0.291 0.259 0.214 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.232 0.253 0.274 0.295 0.316 0.338 0.354 0.371 0.472 0.631 0.846 1.092 1.355 1.631 1.922 2.229 2.555 2.902 3.272 3.667 4.089 4.541 5.023 5.534 6.07 6.619 7.158 7.647 8.018 8.193 8.2 8.175 8.076 7.913 7.699 7.446 7.162 6.858 6.541 6.218 5.893 5.57 5.254 4.946 4.649 4.363 4.09 3.83 3.583 3.349 3.128 2.92 2.725 2.541 2.369 2.208 2.057 1.916 1.785 1.662 1.547 1.44 1.34 1.247 1.16 1.08 1.004 0.935 0.869 0.809 0.752 0.7 0.651 0.605 0.563 0.524 0.487 0.453 0.421 0.392 0.364 0.339 0.315 0.293 0.273 0.254 0.236 0.219 0.204

</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="8.2" PeakHeight="331.136" Num="5" zHalfNm="302.487" Error="3.697">
-101.72 -17.67 10.539 -2.734 -0.691
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.86" Depth="0.154"/>
<TopsideChapman PeakHeight="331.136" PeakDensity="834243.2" PeakScaleHeight="21.524" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
