<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 17:10:00.000"
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="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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.10.17 (290) 17:10:00</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">
FF202629010171710009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.995" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.669" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="6.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.217" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.162" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.253" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="259.513" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="169.824" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.865" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="96.562" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.844" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.284" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="160.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 385.871 386.856 387.982 389.279 390.789 392.572 394.707 397.309 400.552 404.707 410.217 417.880 429.259
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 75 69 75 72 72 75 75 72 72 72 66 69 72 69 69 72 69 66 75 69 54 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 -1.171875 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.519 90.0 95.0 100.0 105.0 110.0 112.508 115.0 115.017 117.525 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 259.513 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.126 2.737 3.059 3.162 3.04 3.04 3.04 3.162 3.237 3.4 3.579 3.766 3.953 4.133 4.302 4.461 4.61 4.751 4.884 5.01 5.132 5.249 5.362 5.473 5.581 5.688 5.794 5.898 6.003 6.109 6.215 6.324 6.436 6.553 6.677 6.811 6.9 6.9 6.894 6.878 6.854 6.82 6.779 6.731 6.676 6.614 6.547 6.474 6.397 6.316 6.231 6.143 6.051 5.958 5.862 5.764 5.664 5.564 5.462 5.36 5.258 5.155 5.052 4.949 4.847 4.745 4.644 4.544 4.444 4.346 4.248 4.152 4.057 3.964 3.871 3.78 3.691 3.603 3.516 3.431 3.348 3.266 3.186 3.107 3.03 2.955 2.881 2.808 2.737 2.668 2.6 2.534 2.469 2.406 2.344 2.284 2.225 2.167 2.111 2.056 2.003 1.95 1.899 1.85 1.801 1.754 1.708 1.663 1.619 1.576 1.535 1.494 1.455 1.416 1.379 1.342 1.306 1.272 1.238 1.205 1.173 1.142 1.111 1.082 1.053 1.025 0.997 0.971 0.945 0.92 0.895 0.871 0.848 0.825 0.803 0.781 0.761 0.74 0.72 0.701 0.682 0.664 0.646 0.629 0.612 0.595 0.58 0.564 0.549 0.534 0.52 0.506 0.492 0.479 0.466 0.454 0.441 0.43 0.418 0.407 0.396 0.385 0.375 0.365 0.355 0.345 0.336 0.327 0.318 0.31 0.301 0.293 0.285 0.278 0.27 0.263 0.256 0.249 0.242 0.236 0.229 0.223 0.217 0.211 0.206 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.162" PeakHeight="110.0" Num="3" Error="0.0">
-30.327 12.896 -3.05
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.162" EndFrequency="6.9" PeakHeight="259.513" Num="5" zHalfNm="169.824" Error="2.942">
-111.959 -48.837 26.66 -8.739 0.887
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.525" Depth="0.122"/>
<TopsideChapman PeakHeight="259.513" PeakDensity="590694.8" PeakScaleHeight="57.284" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
