<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 12:00:00.000"
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="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="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" >
2026.02.05 (036) 12:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603602051200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.507" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.812" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="8.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.974" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.161" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="385.377" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="236.673" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.096" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="204.186" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.594" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="111.805" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="213.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="108">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 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 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 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 220.000 225.000 230.000 235.000 235.000 240.000 245.000 250.000 255.000 260.000 265.000 270.000 275.000 275.000 280.000 280.000 280.000 285.000 287.000 289.000 291.000 293.000 295.000 295.000 297.500 300.000 300.000 302.500 305.000 307.500 310.000 312.500 315.000 315.000 315.000 315.000 320.000 320.000 325.000 330.000 330.000 330.000 335.000 335.000 336.667 338.333 340.000 345.000 348.000 351.000 354.000 357.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 385.000 385.000 390.000 390.000 390.000 400.000 400.000 405.000 405.000 410.000 415.000 425.000 425.000 430.000 435.000 435.000 440.000 445.000 450.000 460.000 480.000 460.000 480.000 485.000 490.000 500.000 505.000 510.000 515.000 525.000 530.000 540.000 545.000 550.000 560.000 570.000 585.000 595.000 610.000 615.000 660.000 690.000 746.551 837.523
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 45 0 0 57 54 51 54 0 57 0 54 0 48 54 51 57 57 60 0 45 54 0 60 60 0 63 63 0 0 0 0 0 0 69 69 66 69 69 69 60 63 60 57 63 0 0 60 60 0 0 0 0 54 66 51 51 57 60 63 60 60 66 60 66 63 66 72 69 75 78 72 69 69 60 69 69 60 48 60 57 63 66 66 45 66 66 69 60 51 63 60 60 63 60 57 57 57 57 60 60 57 54 51 0 42 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -2.734375 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 1.953125 -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 -1.171875 0.390625 1.953125
</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" >
89.55 90.0 95.0 100.0 105.0 110.0 113.336 115.0 116.671 120.0 120.007 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 385.377 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.999 2.574 2.877 2.974 2.852 2.852 2.852 2.974 2.974 3.115 3.259 3.405 3.555 3.706 3.861 4.017 4.176 4.336 4.499 4.663 4.828 4.994 5.162 5.329 5.498 5.666 5.835 6.002 6.169 6.336 6.5 6.663 6.825 6.983 7.14 7.293 7.443 7.59 7.733 7.872 8.007 8.137 8.263 8.383 8.498 8.608 8.712 8.811 8.903 8.989 9.069 9.142 9.209 9.269 9.322 9.369 9.408 9.441 9.466 9.485 9.496 9.5 9.5 9.498 9.493 9.485 9.472 9.457 9.439 9.417 9.392 9.365 9.334 9.302 9.266 9.228 9.188 9.145 9.101 9.054 9.005 8.955 8.903 8.849 8.793 8.736 8.678 8.618 8.557 8.495 8.431 8.367 8.302 8.235 8.168 8.101 8.032 7.963 7.894 7.823 7.753 7.682 7.61 7.539 7.467 7.395 7.323 7.25 7.178 7.105 7.033 6.96 6.888 6.815 6.743 6.671 6.599 6.527 6.456 6.385 6.314 6.243 6.173 6.103 6.033 5.964 5.895 5.827 5.759 5.692 5.625 5.558 5.492 5.426 5.361 5.296 5.232 5.169 5.106 5.043 4.981 4.92 4.859 4.798 4.739 4.679 4.621 4.563 4.505 4.448 4.392 4.336 4.281 4.226 4.172 4.118 4.065 4.013 3.961 3.91 3.859 3.809 3.759 3.71 3.662 3.614 3.566 3.52 3.473 3.427 3.382 3.338 3.293 3.25 3.207 3.164 3.122 3.08 3.039 2.999 2.959 2.919 2.88 2.841 2.803 2.766

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.974" PeakHeight="110.0" Num="3" Error="0.0">
-30.173 12.67 -2.947
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.974" EndFrequency="9.5" PeakHeight="385.377" Num="5" zHalfNm="236.673" Error="2.757">
-270.687 5.956 -0.891 0.283 -0.031
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.007" Depth="0.122"/>
<TopsideChapman PeakHeight="385.377" PeakDensity="1119727.0" PeakScaleHeight="111.805" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
