<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 10:30:00.000"
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="12.0">
<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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.10.21 (294) 10:30:00</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">
FF202629410211030009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.247" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="35.878" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="350.000" 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="2.636" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="255.069" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="193.488" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.798" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="83.639" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.029" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.414" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="92.930" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.650" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="31">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 315.000 315.625 316.250 316.875 317.500 318.125 318.750 319.375 320.000 320.000 335.000 330.000 330.000 325.000 340.000 335.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 370.000 370.000 370.000 380.000 390.000 410.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
33 51 0 0 0 0 0 0 0 60 60 45 57 60 60 51 57 60 63 60 57 57 57 57 57 45 45 54 54 51 48
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="167">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.612 90.0 95.0 100.0 105.0 110.0 114.915 115.0 119.83 120.0 124.745 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 255.069 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.77 2.282 2.551 2.636 2.513 2.513 2.513 2.517 2.636 2.653 2.962 3.266 3.586 3.93 4.301 4.698 5.114 5.539 5.962 6.379 6.784 7.176 7.556 7.924 8.28 8.627 8.963 9.289 9.605 9.908 10.194 10.459 10.692 10.88 11.005 11.05 11.05 11.037 10.999 10.937 10.853 10.751 10.63 10.494 10.344 10.182 10.009 9.827 9.637 9.441 9.24 9.034 8.826 8.615 8.403 8.191 7.979 7.767 7.557 7.349 7.143 6.939 6.739 6.542 6.348 6.157 5.971 5.788 5.61 5.435 5.265 5.099 4.937 4.779 4.625 4.476 4.331 4.189 4.052 3.919 3.79 3.665 3.543 3.425 3.311 3.2 3.093 2.989 2.888 2.791 2.697 2.605 2.517 2.432 2.349 2.269 2.192 2.117 2.045 1.975 1.908 1.842 1.779 1.718 1.659 1.603 1.548 1.494 1.443 1.393 1.346 1.299 1.255 1.211 1.17 1.129 1.091 1.053 1.017 0.982 0.948 0.915 0.884 0.853 0.824 0.795 0.768 0.741 0.716 0.691 0.667 0.644 0.622 0.6 0.58 0.56 0.54 0.522 0.504 0.486 0.469 0.453 0.438 0.422 0.408 0.394 0.38 0.367 0.354 0.342 0.33 0.319 0.308 0.297 0.287 0.277 0.267 0.258 0.249 0.241 0.232 0.224 0.217 0.209 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.636" PeakHeight="110.0" Num="3" Error="0.0">
-29.857 12.214 -2.745
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.636" EndFrequency="11.05" PeakHeight="255.069" Num="5" zHalfNm="193.488" Error="2.445">
-122.586 -13.281 8.654 -4.617 1.506
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.745" Depth="0.123"/>
<TopsideChapman PeakHeight="255.069" PeakDensity="1514919.4" PeakScaleHeight="44.414" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
