<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-12 -285 09:20:00.000"
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="18.0">
<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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: 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" >
2026.10.12 (285) 09:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" 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">
FF202628510120920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="7.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.317" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.541" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.900" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.010" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="98.552" Name="h`E" 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="7.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="316.169" 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="1.893" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="257.778" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="198.856" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.476" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="80.668" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.943" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.788" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="88.170" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.800" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="45">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 266.250 267.500 268.750 270.000 271.000 272.000 273.000 274.000 275.000 275.000 277.500 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 295.000 295.000 300.000 300.000 305.000 306.688 308.595 310.768 313.266 316.169 319.582 323.654 328.595 334.718 342.504 352.737 366.786 387.273 419.940 480.244
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 51 0 0 0 0 75 78 0 69 72 72 75 75 75 75 75 75 75 75 75 75 78 75 69 72 69 75 72 78 75 78 78 75 75 78 63 51 0 0 0 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 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 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.9 1.95 2.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
98.552 100.302 102.684
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="155">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.757 90.0 95.0 100.0 105.0 110.0 115.0 118.811 120.0 125.0 127.621 130.0 135.0 136.432 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 257.778 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.221 1.347 1.741 1.945 2.01 1.965 1.867 1.867 1.867 1.867 1.906 1.987 2.01 2.167 2.401 2.649 2.91 3.182 3.463 3.75 4.042 4.337 4.632 4.928 5.221 5.511 5.795 6.073 6.341 6.596 6.836 7.057 7.253 7.42 7.552 7.644 7.693 7.7 7.698 7.68 7.645 7.593 7.527 7.448 7.357 7.255 7.144 7.024 6.898 6.766 6.629 6.488 6.344 6.197 6.048 5.899 5.749 5.599 5.449 5.3 5.153 5.007 4.863 4.721 4.581 4.443 4.308 4.176 4.047 3.92 3.797 3.676 3.558 3.444 3.332 3.224 3.118 3.015 2.916 2.819 2.725 2.634 2.546 2.46 2.377 2.296 2.218 2.143 2.07 1.999 1.931 1.865 1.801 1.739 1.679 1.621 1.565 1.511 1.459 1.408 1.36 1.312 1.267 1.223 1.18 1.139 1.1 1.062 1.025 0.989 0.954 0.921 0.889 0.858 0.828 0.799 0.771 0.744 0.718 0.693 0.669 0.646 0.623 0.601 0.58 0.56 0.54 0.521 0.503 0.486 0.469 0.452 0.436 0.421 0.406 0.392 0.378 0.365 0.352 0.34 0.328 0.317 0.305 0.295 0.284 0.274 0.265 0.256 0.247 0.238 0.23 0.222 0.214 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.01" PeakHeight="110.0" Num="3" Error="0.0">
-29.085 11.138 -2.296
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.01" EndFrequency="7.7" PeakHeight="257.778" Num="5" zHalfNm="198.856" Error="1.793">
-116.666 -6.981 3.143 -0.977 0.135
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="26.432" Depth="0.143"/>
<TopsideChapman PeakHeight="257.778" PeakDensity="735607.94" PeakScaleHeight="43.788" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
