<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-20 -051 12:20:00.000"
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) 12:20:00</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">
FF202605102201220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="8.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.396" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.368" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.700" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" Name="h`Es" 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="6.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="415.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.075" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.211" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="395.295" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="220.661" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.076" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.300" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="226.035" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.979" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="121.594" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="263.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.620" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="86">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 218.750 222.500 226.250 230.000 236.667 243.333 250.000 255.000 255.000 265.000 270.000 275.000 280.000 290.000 290.000 295.000 300.000 300.000 305.000 310.000 315.000 320.000 320.000 320.000 330.000 330.000 330.000 333.500 337.000 340.500 344.000 347.500 351.000 354.500 358.000 361.500 365.000 370.000 370.000 375.000 380.000 390.000 390.000 395.000 395.000 400.000 410.000 410.000 415.000 425.000 430.000 435.000 440.000 450.000 455.000 465.000 470.000 480.000 485.000 495.000 505.000 515.000 525.000 535.000 545.000 555.000 560.000 575.000 580.000 585.000 600.000 600.000 610.000 615.000 625.000 635.000 645.000 660.000 675.000 690.000 710.000 733.348 761.508 796.138
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 48 0 0 0 57 0 0 48 45 54 57 57 57 51 60 54 45 54 60 0 57 0 0 0 54 0 60 57 0 60 0 0 0 0 0 0 0 51 57 0 51 51 48 54 57 57 60 60 60 63 63 63 60 60 57 54 51 45 57 63 63 57 54 63 63 60 60 60 48 57 63 54 60 63 60 63 66 60 60 60 60 54 54 51 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 0.390625 0.390625 0.390625 0.390625 0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 116.000 117.000 118.000 119.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 0 0 0 0 51 48 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
</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" >
89.533 90.0 95.0 100.0 105.0 110.0 112.884 115.0 115.768 118.652 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 395.295 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.067 2.661 2.975 3.075 2.953 2.953 2.953 3.075 3.104 3.215 3.332 3.455 3.587 3.729 3.881 4.042 4.212 4.387 4.564 4.737 4.906 5.067 5.22 5.366 5.504 5.635 5.761 5.881 5.996 6.106 6.213 6.316 6.416 6.513 6.608 6.7 6.79 6.878 6.964 7.048 7.131 7.213 7.293 7.372 7.45 7.526 7.601 7.676 7.748 7.82 7.89 7.959 8.027 8.092 8.155 8.215 8.272 8.326 8.374 8.416 8.451 8.477 8.494 8.5 8.5 8.499 8.495 8.488 8.479 8.467 8.453 8.436 8.418 8.397 8.373 8.348 8.321 8.292 8.261 8.228 8.193 8.157 8.119 8.08 8.039 7.997 7.954 7.909 7.863 7.816 7.768 7.719 7.669 7.618 7.566 7.514 7.46 7.406 7.352 7.296 7.241 7.184 7.127 7.07 7.012 6.954 6.896 6.838 6.779 6.72 6.66 6.601 6.542 6.482 6.422 6.363 6.303 6.243 6.184 6.124 6.065 6.005 5.946 5.887 5.828 5.769 5.711 5.652 5.594 5.536 5.479 5.421 5.364 5.308 5.251 5.195 5.139 5.084 5.029 4.974 4.919 4.865 4.812 4.758 4.706 4.653 4.601 4.549 4.498 4.447 4.396 4.346 4.297 4.247 4.199 4.15 4.102 4.055 4.008 3.961 3.915 3.869 3.823 3.779 3.734 3.69 3.646 3.603 3.56 3.518 3.476 3.434 3.393 3.353 3.312 3.273 3.233 3.194 3.156 3.117 3.08 3.042 3.005 2.969 2.933 2.897

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.075" PeakHeight="110.0" Num="3" Error="0.0">
-30.257 12.793 -3.003
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.075" EndFrequency="8.5" PeakHeight="395.295" Num="5" zHalfNm="220.661" Error="7.414">
-270.022 -21.985 28.844 -17.017 3.537
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.652" Depth="0.122"/>
<TopsideChapman PeakHeight="395.295" PeakDensity="896402.0" PeakScaleHeight="121.594" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
