<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 08:20:00.000"
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="14.0">
<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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Moderate F-spread, F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.25 (298) 08:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629810250820009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.442" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.901" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="88" Val="5.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="310.000" 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="0.770" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="259.876" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="221.431" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.486" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="54.481" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.117" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.094" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="50.160" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.790" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="75">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 220.000 220.000 220.000 220.000 220.000 220.000 222.500 225.000 225.526 226.053 226.579 227.105 227.632 228.158 228.684 229.211 229.737 230.263 230.789 231.316 231.842 232.368 232.895 233.421 233.947 234.474 235.000 235.526 236.053 236.579 237.105 237.632 238.158 238.684 239.211 239.737 240.263 240.789 241.316 241.842 242.368 242.895 243.421 243.947 244.474 245.000 246.667 248.333 250.000 250.000 251.667 253.333 255.000 260.000 260.000 265.000 265.000 265.000 270.000 275.000 275.000 280.000 280.000 285.000 290.000 295.000 300.000 310.000 310.000 325.000 335.000 345.000 355.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 63 72 78 75 78 72 0 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 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 -2.734375 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>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="108">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.608 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 133.619 135.0 140.0 145.0 150.0 155.0 157.239 160.0 165.0 170.0 175.0 180.0 180.858 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 259.876 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.511 0.667 0.745 0.77 0.758 0.721 0.656 0.552 0.435 0.435 0.435 0.435 0.435 0.435 0.435 0.474 0.545 0.616 0.687 0.758 0.77 0.958 1.178 1.432 1.748 2.145 2.612 3.1 3.556 3.956 4.297 4.579 4.806 4.98 5.103 5.176 5.2 5.2 5.185 5.143 5.078 4.993 4.891 4.775 4.647 4.511 4.368 4.22 4.07 3.917 3.765 3.613 3.463 3.316 3.171 3.03 2.893 2.759 2.631 2.506 2.387 2.272 2.161 2.055 1.954 1.857 1.764 1.676 1.591 1.511 1.434 1.361 1.292 1.226 1.163 1.103 1.046 0.992 0.941 0.892 0.846 0.802 0.761 0.721 0.684 0.648 0.615 0.583 0.552 0.524 0.496 0.47 0.446 0.423 0.401 0.38 0.36 0.341 0.323 0.306 0.29 0.275 0.261 0.247 0.234 0.222 0.21

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.77" PeakHeight="110.0" Num="3" Error="0.0">
-25.202 6.686 -0.876
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.77" EndFrequency="5.2" PeakHeight="259.876" Num="5" zHalfNm="221.431" Error="2.483">
-85.293 9.732 -4.817 0.885 0.475
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="70.858" Depth="0.335"/>
<TopsideChapman PeakHeight="259.876" PeakDensity="335483.88" PeakScaleHeight="29.094" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
