<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 08:40:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2o cusp</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" >
2026.10.15 (288) 08:40:00</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">
FF202628810150840009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.886" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.038" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="436.013" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.129" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="312.386" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="242.862" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.161" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="97.370" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.707" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="51.428" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="102.180" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.860" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
420.000 421.422 423.302 425.907 429.755 436.013 447.979 480.014
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 57 57 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 1.171875 -1.953125 1.171875 1.171875 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="179">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.154 95.0 100.0 105.0 110.0 115.0 120.0 124.757 125.0 130.0 135.0 139.515 140.0 145.0 150.0 154.272 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 312.386 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.753 0.978 1.093 1.129 1.11 1.05 0.951 0.951 0.951 0.951 0.951 0.957 1.017 1.077 1.129 1.149 1.282 1.416 1.557 1.706 1.867 2.038 2.221 2.415 2.616 2.825 3.037 3.251 3.466 3.679 3.89 4.099 4.304 4.505 4.701 4.892 5.077 5.255 5.425 5.585 5.734 5.869 5.988 6.088 6.166 6.22 6.247 6.25 6.248 6.237 6.215 6.184 6.143 6.094 6.038 5.974 5.905 5.829 5.749 5.665 5.576 5.484 5.39 5.292 5.193 5.093 4.991 4.888 4.784 4.681 4.577 4.474 4.37 4.268 4.166 4.065 3.966 3.867 3.77 3.674 3.579 3.486 3.395 3.305 3.217 3.131 3.047 2.964 2.883 2.804 2.726 2.65 2.577 2.504 2.434 2.365 2.298 2.233 2.169 2.107 2.047 1.988 1.931 1.875 1.821 1.768 1.716 1.666 1.618 1.571 1.525 1.48 1.437 1.394 1.353 1.314 1.275 1.237 1.201 1.165 1.131 1.098 1.065 1.033 1.003 0.973 0.944 0.916 0.889 0.863 0.837 0.812 0.788 0.764 0.742 0.72 0.698 0.677 0.657 0.638 0.619 0.6 0.582 0.565 0.548 0.532 0.516 0.5 0.485 0.471 0.457 0.443 0.43 0.417 0.405 0.393 0.381 0.369 0.358 0.348 0.337 0.327 0.317 0.308 0.299 0.29 0.281 0.273 0.265 0.257 0.249 0.242 0.234 0.227 0.221 0.214 0.208 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.129" PeakHeight="110.0" Num="3" Error="0.0">
-27.032 8.581 -1.395
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.129" EndFrequency="6.25" PeakHeight="312.386" Num="5" zHalfNm="242.862" Error="2.294">
-153.954 -7.179 4.674 -2.716 1.061
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="44.272" Depth="0.178"/>
<TopsideChapman PeakHeight="312.386" PeakDensity="484646.4" PeakScaleHeight="51.428" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
