<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-23 -296 13:00:00.000"
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 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" >
2026.10.23 (296) 13:00:00</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">
FF202629610231300009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.013" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.800" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="392.221" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.286" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.312" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="266.982" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="182.327" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.114" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="95.191" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="19.189" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.418" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="37">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.75 7.8 7.85 7.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 381.410 383.005 384.824 386.917 389.352 392.221 395.649 399.819 405.000 411.611 420.339 432.395
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 60 63 57 0 63 60 63 66 69 63 69 69 66 66 69 63 69 69 66 69 66 66 66 69 69 69 72 69 69 69 66 66 66 51 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
</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" >
89.499 90.0 95.0 100.0 105.0 110.0 111.982 113.964 115.0 115.946 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 266.982 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.21 2.844 3.179 3.286 3.164 3.164 3.228 3.286 3.432 3.63 3.838 4.043 4.24 4.426 4.602 4.77 4.93 5.084 5.233 5.378 5.521 5.661 5.799 5.936 6.072 6.208 6.344 6.481 6.619 6.758 6.9 7.044 7.191 7.341 7.494 7.648 7.792 7.89 7.9 7.898 7.885 7.861 7.827 7.783 7.73 7.669 7.6 7.524 7.442 7.354 7.261 7.164 7.062 6.957 6.849 6.738 6.624 6.509 6.393 6.275 6.156 6.037 5.917 5.798 5.679 5.56 5.441 5.324 5.207 5.091 4.977 4.863 4.752 4.641 4.532 4.425 4.32 4.216 4.114 4.013 3.915 3.818 3.723 3.63 3.539 3.45 3.362 3.277 3.193 3.111 3.031 2.953 2.877 2.802 2.729 2.658 2.588 2.52 2.454 2.389 2.326 2.265 2.205 2.146 2.089 2.034 1.979 1.926 1.875 1.825 1.776 1.728 1.682 1.637 1.593 1.55 1.508 1.467 1.428 1.389 1.352 1.315 1.28 1.245 1.211 1.179 1.147 1.115 1.085 1.056 1.027 0.999 0.972 0.946 0.92 0.895 0.871 0.847 0.824 0.802 0.78 0.758 0.738 0.718 0.698 0.679 0.661 0.643 0.625 0.608 0.592 0.575 0.56 0.544 0.53 0.515 0.501 0.487 0.474 0.461 0.449 0.436 0.424 0.413 0.402 0.391 0.38 0.37 0.36 0.35 0.34 0.331 0.322 0.313 0.305 0.296 0.288 0.28 0.273 0.265 0.258 0.251 0.244 0.237 0.231 0.225

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.286" PeakHeight="110.0" Num="3" Error="0.0">
-30.424 13.038 -3.115
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.286" EndFrequency="7.9" PeakHeight="266.982" Num="5" zHalfNm="182.327" Error="2.239">
-121.908 -45.861 21.459 -4.395 -0.331
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.946" Depth="0.122"/>
<TopsideChapman PeakHeight="266.982" PeakDensity="774317.6" PeakScaleHeight="56.418" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
