<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-02 -033 15:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.02.02 (033) 15:00:00</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">
FF202603302021500009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.384" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.199" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="7.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="415.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="415.000" 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="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="556.262" 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="3.374" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.352" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="369.157" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="237.721" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.491" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="165.079" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.288" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="90.944" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="214.600" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.290" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="51">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
415.000 415.000 417.500 420.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 460.000 460.000 460.000 465.000 470.000 475.000 480.000 480.000 485.000 490.000 495.000 505.000 505.000 510.000 515.000 520.000 525.000 530.000 530.000 535.000 540.000 545.000 550.000 552.969 556.262 559.938 564.067 568.737 574.062 580.192 587.323 595.721 605.759 617.969 633.139 652.496
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 45 48 45 48 45 45 45 48 48 48 51 48 45 0 54 54 54 54 54 51 48 48 51 45 48 48 48 51 51 51 51 48 54 60 63 54 57 57 51 42 48 51 0 57 57 57 54 48
</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 -1.953125 0.390625 0.390625 -2.734375 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" >
89.486 90.0 95.0 100.0 105.0 110.0 111.618 113.236 114.854 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 369.157 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.27 2.92 3.264 3.374 3.251 3.251 3.374 3.378 3.521 3.668 3.82 3.976 4.136 4.3 4.467 4.635 4.805 4.975 5.143 5.31 5.475 5.637 5.796 5.952 6.105 6.255 6.403 6.548 6.69 6.83 6.968 7.104 7.238 7.37 7.501 7.631 7.759 7.886 8.012 8.138 8.262 8.386 8.51 8.633 8.755 8.877 8.999 9.121 9.242 9.363 9.482 9.6 9.714 9.825 9.928 10.019 10.091 10.137 10.15 10.15 10.146 10.136 10.121 10.1 10.075 10.044 10.009 9.969 9.925 9.877 9.825 9.77 9.71 9.648 9.583 9.514 9.443 9.37 9.294 9.216 9.136 9.054 8.97 8.885 8.798 8.71 8.62 8.53 8.439 8.346 8.254 8.16 8.066 7.972 7.877 7.782 7.687 7.591 7.496 7.401 7.306 7.211 7.116 7.022 6.928 6.834 6.741 6.648 6.556 6.465 6.374 6.283 6.194 6.105 6.017 5.929 5.842 5.757 5.671 5.587 5.504 5.421 5.339 5.259 5.179 5.1 5.021 4.944 4.868 4.793 4.718 4.644 4.572 4.5 4.429 4.359 4.29 4.222 4.155 4.089 4.024 3.959 3.896 3.833 3.771 3.71 3.65 3.591 3.533 3.475 3.419 3.363 3.308 3.254 3.201 3.148 3.097 3.046 2.995 2.946 2.897 2.85 2.802 2.756 2.71 2.665 2.621 2.578 2.535 2.493 2.451 2.41 2.37 2.33 2.292 2.253 2.216 2.178 2.142 2.106 2.071 2.036 2.002 1.968 1.935 1.903

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.374" PeakHeight="110.0" Num="3" Error="0.0">
-30.489 13.134 -3.159
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.374" EndFrequency="10.15" PeakHeight="369.157" Num="5" zHalfNm="237.721" Error="2.232">
-221.625 -54.265 31.091 -11.389 1.885
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.854" Depth="0.123"/>
<TopsideChapman PeakHeight="369.157" PeakDensity="1278194.8" PeakScaleHeight="90.944" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
