<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-20 -051 13:00:00.000"
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" >
2026.02.20 (051) 13:00:00</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">
FF202605102201300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.533" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.407" 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="8.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="7.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.213" 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="4.277" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="373.201" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.529" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.082" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="193.914" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.921" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="109.275" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="217.730" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.870" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="63">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 350.000 350.000 352.500 355.000 355.000 355.000 360.000 362.500 365.000 365.000 365.000 367.500 370.000 370.000 370.000 375.000 375.000 380.000 380.000 381.667 383.333 385.000 385.000 390.000 390.000 390.000 400.000 402.500 405.000 405.000 410.000 415.000 415.000 415.000 425.000 425.000 430.000 435.000 440.000 445.000 445.000 455.000 460.000 465.000 470.000 475.000 485.000 490.000 500.000 510.000 515.000 524.737 535.659 547.997 562.045 578.186 596.925 618.944 645.187 676.997 716.357 766.316
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 48 0 51 54 51 57 0 51 51 51 0 51 51 60 57 63 51 51 0 0 60 60 60 63 54 60 45 60 60 63 60 66 66 60 63 60 48 54 57 51 54 57 57 57 60 66 63 63 66 66 63 63 0 0 0 0 0 0 0 0 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 -1.953125 0.390625 0.390625 -0.390625 -1.171875 0.390625 0.390625 -0.390625 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 -1.953125 -1.953125 1.171875 -1.171875 2.734375 0.390625 1.171875 -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" >
89.51 90.0 95.0 100.0 105.0 110.0 112.289 114.577 115.0 116.866 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.201 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.161 2.781 3.108 3.213 3.091 3.091 3.114 3.213 3.296 3.426 3.554 3.679 3.803 3.926 4.048 4.17 4.292 4.413 4.535 4.657 4.78 4.903 5.026 5.151 5.276 5.401 5.528 5.655 5.782 5.91 6.038 6.167 6.295 6.423 6.55 6.676 6.801 6.924 7.045 7.164 7.279 7.391 7.5 7.604 7.703 7.797 7.886 7.969 8.047 8.118 8.182 8.24 8.291 8.335 8.372 8.402 8.425 8.44 8.449 8.45 8.45 8.447 8.441 8.431 8.419 8.403 8.384 8.363 8.339 8.312 8.283 8.252 8.218 8.182 8.144 8.103 8.061 8.017 7.972 7.924 7.875 7.825 7.773 7.72 7.665 7.61 7.553 7.496 7.437 7.377 7.317 7.256 7.194 7.132 7.069 7.005 6.941 6.877 6.812 6.747 6.682 6.616 6.551 6.485 6.419 6.353 6.287 6.221 6.155 6.089 6.023 5.958 5.892 5.827 5.762 5.697 5.632 5.568 5.504 5.44 5.377 5.314 5.251 5.189 5.127 5.066 5.005 4.944 4.884 4.824 4.765 4.706 4.648 4.59 4.533 4.476 4.419 4.364 4.308 4.253 4.199 4.145 4.092 4.04 3.987 3.936 3.885 3.834 3.784 3.734 3.685 3.637 3.589 3.542 3.495 3.448 3.403 3.357 3.313 3.268 3.225 3.181 3.139 3.096 3.055 3.013 2.973 2.932 2.893 2.853 2.815 2.776 2.739 2.701 2.664 2.628 2.592 2.556 2.521 2.487 2.453 2.419 2.386 2.353 2.32 2.288

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.213" PeakHeight="110.0" Num="3" Error="0.0">
-30.368 12.955 -3.077
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.213" EndFrequency="8.45" PeakHeight="373.201" Num="5" zHalfNm="227.529" Error="4.562">
-247.338 -11.763 0.957 2.142 -0.333
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.866" Depth="0.122"/>
<TopsideChapman PeakHeight="373.201" PeakDensity="885887.1" PeakScaleHeight="109.275" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
