<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-10 -041 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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2x cusp not found, 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" >
2026.02.10 (041) 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">
FF202604102101500009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.280" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.602" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="606.714" 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="3.385" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.357" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="399.476" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="265.334" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.492" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="165.499" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.569" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="91.861" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="227.730" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.150" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="101">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 310.000 313.125 316.250 319.375 322.500 325.625 328.750 331.875 335.000 335.000 337.778 340.556 343.333 346.111 348.889 351.667 354.444 357.222 360.000 365.000 370.000 365.000 375.000 375.000 377.500 380.000 382.500 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 427.500 430.000 430.000 440.000 440.000 445.000 445.000 455.000 460.000 460.000 465.000 470.000 480.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 520.000 520.000 525.000 530.000 530.000 535.000 540.000 540.000 540.000 545.000 545.000 550.000 555.000 555.000 555.000 555.000 565.000 565.000 570.000 575.000 575.000 575.000 585.000 585.000 590.000 595.000 600.000 603.190 606.714 610.628 615.000 619.916 625.484 631.842 639.172 647.716 657.801 669.887
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 51 0 0 0 0 0 48 51 0 0 0 0 54 0 0 0 48 54 51 45 51 54 0 51 0 57 54 60 54 60 54 57 54 60 57 60 57 51 57 48 0 60 60 54 60 57 60 60 60 60 60 60 57 60 60 60 60 60 57 57 54 57 54 51 60 57 54 60 57 60 57 60 54 54 57 48 51 54 54 48 54 54 48 48 51 48 42 42 48 48 48 51 0 45 48 42 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -1.953125 -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 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 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.953125 -1.171875 -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" >
89.485 90.0 95.0 100.0 105.0 110.0 111.574 113.147 114.721 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 399.476 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.277 2.929 3.275 3.385 3.262 3.262 3.385 3.393 3.536 3.667 3.792 3.915 4.038 4.16 4.283 4.407 4.533 4.661 4.791 4.923 5.056 5.19 5.326 5.462 5.599 5.736 5.872 6.009 6.144 6.279 6.412 6.544 6.675 6.805 6.933 7.06 7.186 7.31 7.434 7.556 7.677 7.797 7.916 8.035 8.153 8.27 8.387 8.504 8.621 8.737 8.854 8.97 9.087 9.205 9.323 9.441 9.561 9.68 9.801 9.921 10.039 10.152 10.253 10.326 10.35 10.35 10.346 10.337 10.322 10.302 10.277 10.246 10.211 10.172 10.128 10.08 10.028 9.973 9.914 9.852 9.786 9.718 9.647 9.573 9.497 9.419 9.338 9.256 9.172 9.086 8.999 8.911 8.821 8.73 8.638 8.545 8.452 8.357 8.263 8.168 8.072 7.976 7.88 7.784 7.688 7.592 7.496 7.4 7.304 7.209 7.113 7.019 6.924 6.831 6.737 6.645 6.552 6.461 6.37 6.28 6.19 6.102 6.013 5.926 5.84 5.754 5.669 5.585 5.502 5.42 5.339 5.258 5.179 5.1 5.022 4.946 4.87 4.795 4.721 4.647 4.575 4.504 4.433 4.364 4.295 4.228 4.161 4.095 4.03 3.966 3.903 3.841 3.779 3.719 3.659 3.6 3.542 3.485 3.429 3.374 3.319 3.265 3.212 3.16 3.108 3.058 3.008 2.959 2.91 2.863 2.816 2.77 2.724 2.679 2.635 2.592 2.549 2.507 2.466 2.425 2.385 2.345 2.307 2.268 2.231 2.194

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.385" PeakHeight="110.0" Num="3" Error="0.0">
-30.496 13.146 -3.165
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.385" EndFrequency="10.35" PeakHeight="399.476" Num="5" zHalfNm="265.334" Error="3.624">
-232.016 -80.426 37.538 -13.867 4.016
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.721" Depth="0.123"/>
<TopsideChapman PeakHeight="399.476" PeakDensity="1329063.2" PeakScaleHeight="91.861" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
