<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 06:00:00.000"
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="15.0">
<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 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 25% PACIFIC flags: Severe F-spread, F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace, 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" >
2026.10.17 (290) 06:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629010170600009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.979" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.936" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="378.069" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="378.069" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="385.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="344.114" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="298.512" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.819" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="66.050" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.176" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="34.366" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="65.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.070" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
378.069 382.068 385.000 395.000 400.000 415.000 435.000 465.000 528.291
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 -1.953125 1.953125 1.171875 1.953125 1.171875 1.171875 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="139">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.383 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.766 185.0 190.0 195.0 200.0 205.0 210.0 215.0 216.149 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 344.114 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.332 0.313 0.288 0.253 0.204 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.218 0.24 0.262 0.284 0.305 0.327 0.349 0.354 0.417 0.512 0.623 0.749 0.893 1.055 1.235 1.434 1.653 1.889 2.143 2.412 2.694 2.985 3.282 3.578 3.869 4.148 4.41 4.649 4.859 5.037 5.177 5.277 5.335 5.35 5.35 5.335 5.301 5.249 5.182 5.101 5.008 4.906 4.795 4.678 4.555 4.428 4.298 4.167 4.034 3.901 3.769 3.637 3.507 3.38 3.254 3.131 3.011 2.894 2.78 2.669 2.562 2.458 2.357 2.26 2.166 2.076 1.988 1.904 1.824 1.746 1.671 1.6 1.531 1.465 1.401 1.341 1.282 1.226 1.173 1.122 1.073 1.026 0.981 0.938 0.896 0.857 0.819 0.783 0.748 0.715 0.684 0.654 0.625 0.597 0.571 0.545 0.521 0.498 0.476 0.455 0.435 0.415 0.397 0.379 0.363 0.347 0.331 0.316 0.302 0.289 0.276 0.264 0.252 0.241 0.23 0.22 0.21 0.201

</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="5.35" PeakHeight="344.114" Num="5" zHalfNm="298.512" Error="0.938">
-127.992 -0.091 -0.074 0.302 -0.11
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="106.149" Depth="0.154"/>
<TopsideChapman PeakHeight="344.114" PeakDensity="355117.88" PeakScaleHeight="34.366" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
