<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-11 -042 19:00:00.000"
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: 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) 19:00:00</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">
FF202604202111900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.419" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.790" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" 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="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.779" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="388.903" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="264.755" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.598" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="166.647" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.604" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="90.191" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="190.130" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.600" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="128">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 235.000 240.000 245.000 250.000 255.000 260.000 260.000 260.000 265.000 275.000 277.500 280.000 280.000 285.000 290.000 290.000 290.000 295.000 295.000 300.000 305.000 305.000 305.000 308.750 312.500 316.250 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 347.500 350.000 350.000 352.500 355.000 357.500 360.000 360.000 360.000 365.000 367.500 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 455.000 460.000 460.000 470.000 470.000 475.000 475.000 480.000 485.000 490.000 495.000 495.000 505.000 510.000 510.000 515.000 525.000 525.000 530.000 535.000 540.000 545.727 551.972 558.808 566.323 574.625 583.842 594.136 605.707 618.808 633.764 650.999 671.077 694.765
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 45 48 0 0 51 0 45 60 57 57 45 0 54 57 0 54 57 54 60 54 0 57 60 57 48 0 0 51 54 60 57 60 60 0 57 60 63 63 63 63 66 60 63 63 63 60 60 63 63 0 63 63 0 66 0 63 0 69 60 0 54 63 63 54 0 63 57 63 63 63 66 60 66 57 66 60 63 57 66 57 66 63 66 66 63 69 66 60 66 66 66 66 66 66 66 63 63 66 69 66 63 63 63 60 60 54 51 63 63 51 63 63 60 60 60 60 60 54 57 57 54 51 54 51 0 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 -1.953125 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.171875
</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" >
89.585 90.0 95.0 100.0 105.0 110.0 114.23 115.0 118.459 120.0 122.689 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 388.903 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.867 2.406 2.689 2.779 2.657 2.657 2.657 2.701 2.779 2.842 2.973 3.1 3.226 3.352 3.48 3.611 3.745 3.883 4.026 4.173 4.325 4.481 4.643 4.808 4.977 5.15 5.325 5.502 5.68 5.859 6.038 6.216 6.393 6.569 6.744 6.916 7.087 7.256 7.423 7.587 7.75 7.91 8.068 8.224 8.377 8.528 8.677 8.823 8.966 9.106 9.243 9.376 9.504 9.626 9.742 9.851 9.95 10.039 10.114 10.175 10.219 10.244 10.25 10.25 10.245 10.235 10.219 10.198 10.171 10.14 10.103 10.062 10.017 9.967 9.914 9.857 9.796 9.732 9.665 9.595 9.522 9.447 9.369 9.289 9.207 9.123 9.037 8.95 8.861 8.771 8.68 8.588 8.494 8.4 8.305 8.21 8.114 8.018 7.921 7.824 7.728 7.63 7.533 7.437 7.34 7.243 7.147 7.051 6.955 6.86 6.766 6.672 6.578 6.485 6.393 6.301 6.21 6.12 6.031 5.942 5.854 5.767 5.681 5.595 5.511 5.427 5.345 5.263 5.182 5.102 5.023 4.945 4.868 4.792 4.716 4.642 4.569 4.496 4.425 4.354 4.285 4.216 4.148 4.082 4.016 3.951 3.887 3.824 3.761 3.7 3.64 3.58 3.522 3.464 3.407 3.351 3.295 3.241 3.187 3.135 3.083 3.031 2.981 2.932 2.883 2.835 2.787 2.741 2.695 2.65 2.605 2.562 2.519 2.476 2.435 2.394 2.354 2.314 2.275 2.237 2.199 2.162 2.125 2.089 2.054 2.019

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.779" PeakHeight="110.0" Num="3" Error="0.0">
-29.998 12.416 -2.833
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.779" EndFrequency="10.25" PeakHeight="388.903" Num="5" zHalfNm="264.755" Error="6.461">
-241.324 -34.498 13.903 -7.014 2.719
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.689" Depth="0.122"/>
<TopsideChapman PeakHeight="388.903" PeakDensity="1303505.0" PeakScaleHeight="90.191" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
