<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 18:30:00.000"
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: F2x cusp not found, 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" >
2026.10.25 (298) 18:30:00</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">
FF202629810251830009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.864" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="34.653" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="11.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="425.000" 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="2.781" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="304.074" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="223.554" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.278" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="107.694" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.584" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.272" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="127.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="55">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 365.000 365.000 365.000 365.000 370.000 371.250 372.500 373.750 375.000 375.000 375.000 375.000 376.667 378.333 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 420.000 425.000 425.000 425.000 435.000 440.000 440.000 445.000 450.000 455.000 465.000 472.920 481.782
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 63 66 60 60 0 0 0 0 60 63 63 63 0 0 57 60 0 66 0 57 60 0 0 51 0 0 0 0 0 0 0 0 0 0 42 0 0 0 48 42 0 0 0 0 0 0 0 51 0 0 0 45 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 -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" >
89.584 90.0 95.0 100.0 105.0 110.0 114.22 115.0 118.44 120.0 122.66 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 304.074 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.869 2.407 2.691 2.781 2.659 2.659 2.659 2.704 2.781 2.891 3.121 3.355 3.601 3.861 4.14 4.437 4.75 5.074 5.403 5.731 6.056 6.373 6.682 6.982 7.274 7.558 7.835 8.105 8.37 8.631 8.887 9.14 9.39 9.638 9.884 10.129 10.373 10.615 10.856 11.095 11.33 11.557 11.767 11.946 12.066 12.1 12.1 12.087 12.057 12.011 11.949 11.874 11.785 11.684 11.572 11.449 11.318 11.178 11.031 10.877 10.718 10.553 10.384 10.211 10.036 9.857 9.677 9.495 9.312 9.129 8.945 8.762 8.579 8.397 8.216 8.036 7.858 7.681 7.507 7.334 7.164 6.996 6.831 6.668 6.507 6.35 6.195 6.043 5.893 5.747 5.603 5.462 5.325 5.189 5.057 4.928 4.801 4.678 4.557 4.439 4.323 4.21 4.1 3.993 3.888 3.785 3.685 3.588 3.493 3.4 3.31 3.221 3.135 3.052 2.97 2.89 2.813 2.737 2.664 2.592 2.522 2.454 2.388 2.324 2.261 2.2 2.14 2.082 2.026 1.971 1.917 1.865 1.815 1.765 1.717 1.671 1.625 1.581 1.538 1.496 1.455 1.416 1.377 1.34 1.303 1.268 1.233 1.199 1.167 1.135 1.104 1.074 1.044 1.016 0.988 0.961 0.935 0.909 0.884 0.86 0.837 0.814 0.792 0.77 0.749 0.728 0.709 0.689 0.67 0.652 0.634 0.617 0.6 0.583 0.568 0.552 0.537 0.522 0.508 0.494 0.48 0.467 0.455 0.442 0.43 0.418

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.781" PeakHeight="110.0" Num="3" Error="0.0">
-30.0 12.419 -2.835
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.781" EndFrequency="12.1" PeakHeight="304.074" Num="5" zHalfNm="223.554" Error="3.298">
-161.774 -33.774 22.0 -10.606 2.74
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.66" Depth="0.122"/>
<TopsideChapman PeakHeight="304.074" PeakDensity="1816501.2" PeakScaleHeight="56.272" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
