<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 19:40:00.000"
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: 100%</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" >
2026.02.11 (042) 19:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202604202111940009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.468" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.795" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.497" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="384.441" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.236" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.535" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="151.474" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.367" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="80.646" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="173.620" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.530" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 230.000 230.000 235.000 240.000 240.000 241.667 243.333 245.000 245.000 247.500 250.000 255.000 255.000 255.000 260.000 262.500 265.000 267.500 270.000 272.500 275.000 277.500 280.000 280.000 281.667 283.333 285.000 286.667 288.333 290.000 290.000 290.000 295.000 296.875 298.750 300.625 302.500 304.375 306.250 308.125 310.000 310.000 310.000 315.000 315.000 315.000 317.500 320.000 320.000 325.000 325.000 327.500 330.000 330.000 332.500 335.000 340.000 340.000 340.000 341.667 343.333 345.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 382.500 385.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 455.000 455.000 460.000 460.000 462.500 465.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 490.000 495.000 500.000 500.000 505.000 507.500 510.000 515.000 520.000 525.000 535.000 540.000 545.000 552.253 560.279 569.210 579.207 590.473 603.266 617.920 634.872 654.709
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 54 60 48 57 0 0 57 57 0 54 51 0 0 51 0 0 0 0 0 0 0 48 54 0 0 0 60 0 57 60 57 60 0 0 0 0 0 0 0 60 63 63 63 66 66 0 66 60 63 66 0 63 66 0 63 54 57 63 0 0 66 57 63 54 60 48 57 63 51 60 63 54 63 63 60 63 57 63 66 0 66 60 66 63 51 60 51 60 54 63 66 66 57 66 60 66 63 66 66 63 63 63 63 60 51 60 54 63 0 63 66 66 66 63 63 63 60 63 54 60 0 60 63 60 0 60 0 60 60 60 60 54 51 48 51 51 54 57 48 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 -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 -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 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 1.953125 -1.171875
</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" >
89.641 90.0 95.0 100.0 105.0 110.0 115.0 115.599 120.0 121.199 125.0 126.798 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.441 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23 1.677 2.162 2.416 2.497 2.398 2.372 2.372 2.372 2.457 2.497 2.575 2.697 2.819 2.944 3.072 3.205 3.343 3.487 3.637 3.794 3.957 4.127 4.302 4.483 4.669 4.858 5.05 5.243 5.437 5.631 5.825 6.017 6.208 6.396 6.583 6.768 6.951 7.131 7.31 7.487 7.661 7.834 8.005 8.175 8.343 8.509 8.673 8.835 8.996 9.154 9.309 9.462 9.611 9.754 9.892 10.021 10.14 10.245 10.333 10.398 10.438 10.45 10.45 10.445 10.433 10.414 10.387 10.354 10.315 10.27 10.22 10.163 10.102 10.037 9.966 9.892 9.814 9.732 9.647 9.559 9.467 9.374 9.277 9.179 9.079 8.977 8.873 8.768 8.662 8.554 8.446 8.337 8.228 8.118 8.007 7.897 7.786 7.676 7.565 7.455 7.345 7.235 7.126 7.018 6.91 6.802 6.696 6.59 6.485 6.381 6.277 6.175 6.074 5.973 5.874 5.776 5.679 5.583 5.488 5.395 5.302 5.211 5.121 5.032 4.944 4.857 4.772 4.688 4.605 4.523 4.443 4.363 4.285 4.208 4.132 4.058 3.984 3.912 3.841 3.771 3.702 3.635 3.568 3.503 3.438 3.375 3.313 3.251 3.191 3.132 3.074 3.017 2.961 2.906 2.852 2.798 2.746 2.695 2.644 2.595 2.546 2.498 2.451 2.405 2.36 2.316 2.272 2.229 2.187 2.146 2.105 2.065 2.026 1.988 1.95 1.913 1.877 1.841 1.807 1.772 1.739 1.706 1.673 1.641 1.61 1.579

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.497" PeakHeight="110.0" Num="3" Error="0.0">
-29.712 12.007 -2.654
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.497" EndFrequency="10.45" PeakHeight="384.441" Num="5" zHalfNm="272.236" Error="4.246">
-229.144 -39.958 18.167 -9.469 2.761
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.798" Depth="0.125"/>
<TopsideChapman PeakHeight="384.441" PeakDensity="1354869.8" PeakScaleHeight="80.646" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
