<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-27 -300 18:50:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.27 (300) 18:50:00</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">
FF202630010271850009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.265" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.695" 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="7.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="6.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="351.501" 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="2.648" 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="/" />
<URSI ID="92" Val="251.104" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="189.756" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.353" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="68.940" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.287" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="41.506" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="113.550" 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="40">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 321.667 323.333 325.000 325.000 325.000 325.000 327.500 330.000 330.000 330.000 335.000 335.000 340.000 342.500 345.000 346.693 348.801 351.501 355.080 360.051 367.425
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 72 69 69 72 72 72 69 72 72 72 72 69 72 72 72 72 72 69 0 0 72 72 66 63 0 72 69 63 75 72 69 0 66 69 0 66 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 1.953125 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="145">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.609 90.0 95.0 100.0 105.0 110.0 114.857 115.0 119.713 120.0 124.57 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 251.104 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.779 2.292 2.562 2.648 2.525 2.525 2.525 2.532 2.648 2.664 2.873 3.103 3.323 3.523 3.706 3.876 4.037 4.191 4.341 4.488 4.633 4.777 4.921 5.067 5.215 5.367 5.522 5.682 5.849 6.024 6.208 6.403 6.608 6.81 6.944 6.95 6.944 6.92 6.879 6.823 6.753 6.67 6.576 6.472 6.36 6.241 6.116 5.985 5.851 5.714 5.574 5.432 5.29 5.147 5.004 4.862 4.72 4.581 4.443 4.306 4.173 4.041 3.912 3.786 3.662 3.542 3.424 3.309 3.198 3.089 2.983 2.881 2.781 2.684 2.591 2.5 2.412 2.327 2.244 2.164 2.087 2.013 1.941 1.871 1.804 1.738 1.676 1.615 1.557 1.5 1.446 1.393 1.342 1.293 1.246 1.201 1.157 1.114 1.074 1.034 0.996 0.96 0.925 0.891 0.858 0.826 0.796 0.767 0.739 0.711 0.685 0.66 0.636 0.612 0.59 0.568 0.547 0.527 0.507 0.489 0.471 0.453 0.437 0.42 0.405 0.39 0.376 0.362 0.348 0.336 0.323 0.311 0.3 0.289 0.278 0.268 0.258 0.248 0.239 0.23 0.222 0.214 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.648" PeakHeight="110.0" Num="3" Error="0.0">
-29.869 12.231 -2.753
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.648" EndFrequency="6.95" PeakHeight="251.104" Num="5" zHalfNm="189.756" Error="3.26">
-98.4 -43.249 17.52 -1.2 -1.205
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.57" Depth="0.123"/>
<TopsideChapman PeakHeight="251.104" PeakDensity="599286.6" PeakScaleHeight="41.506" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
