<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 12:10:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.10.28 (301) 12:10:00</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">
FF202630110281210009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.191" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.817" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.450" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="362.281" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.142" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.244" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="252.955" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="184.281" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.980" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.973" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.286" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.532" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="128.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="44">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.000 317.500 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 340.000 342.000 344.000 346.000 348.000 350.000 350.000 350.000 355.000 355.000 360.000 362.281 365.082 368.604 373.164 379.304
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 60 0 63 66 66 66 66 69 69 69 69 66 69 69 69 69 66 69 69 72 69 69 0 69 72 66 72 0 0 0 0 69 72 72 69 72 66 72 63 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 0.390625 -0.390625 0.390625 -0.390625 -0.390625 1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="159">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.522 90.0 95.0 100.0 105.0 110.0 112.592 115.0 115.183 117.775 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 252.955 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.113 2.719 3.04 3.142 3.02 3.02 3.02 3.142 3.241 3.449 3.632 3.795 3.944 4.083 4.216 4.343 4.467 4.589 4.71 4.83 4.951 5.074 5.198 5.325 5.456 5.592 5.734 5.883 6.04 6.209 6.39 6.585 6.789 6.986 7.124 7.15 7.149 7.135 7.106 7.064 7.009 6.943 6.867 6.782 6.689 6.589 6.482 6.37 6.253 6.133 6.009 5.883 5.755 5.625 5.494 5.363 5.232 5.101 4.971 4.842 4.713 4.587 4.461 4.338 4.216 4.097 3.979 3.864 3.751 3.641 3.533 3.427 3.324 3.223 3.125 3.029 2.936 2.845 2.757 2.671 2.587 2.506 2.427 2.35 2.276 2.203 2.133 2.065 1.999 1.934 1.872 1.812 1.754 1.697 1.642 1.589 1.537 1.487 1.439 1.392 1.347 1.303 1.26 1.219 1.179 1.141 1.103 1.067 1.032 0.998 0.966 0.934 0.903 0.874 0.845 0.817 0.79 0.764 0.739 0.715 0.691 0.669 0.647 0.625 0.605 0.585 0.566 0.547 0.529 0.511 0.495 0.478 0.463 0.447 0.433 0.418 0.404 0.391 0.378 0.366 0.354 0.342 0.331 0.32 0.309 0.299 0.289 0.28 0.27 0.262 0.253 0.245 0.236 0.229 0.221 0.214 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.142" PeakHeight="110.0" Num="3" Error="0.0">
-30.311 12.873 -3.04
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.142" EndFrequency="7.15" PeakHeight="252.955" Num="5" zHalfNm="184.281" Error="3.721">
-101.15 -48.254 12.917 2.785 -1.478
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.775" Depth="0.122"/>
<TopsideChapman PeakHeight="252.955" PeakDensity="634274.2" PeakScaleHeight="46.532" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
