<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-22 -053 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 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" >
2026.02.22 (053) 15:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605302221500009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.411" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.866" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" 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="8.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" 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="3.398" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.364" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="370.530" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="238.571" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.493" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="167.307" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.619" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="92.703" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="211.050" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.370" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="107">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 215.000 222.500 230.000 237.500 245.000 257.500 270.000 275.000 282.500 290.000 295.000 297.500 300.000 305.000 310.000 310.000 310.000 315.000 317.500 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 332.143 334.286 336.429 338.571 340.714 342.857 345.000 340.000 340.000 345.000 350.000 352.500 355.000 350.000 355.000 360.000 360.000 362.500 365.000 370.000 370.000 370.000 375.000 380.000 382.500 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 430.000 430.000 435.000 440.000 445.000 445.000 450.000 455.000 465.000 470.000 475.000 485.000 485.000 490.000 490.000 495.000 500.000 510.000 515.000 515.000 520.000 525.000 530.000 535.000 535.000 540.000 550.000 555.000 560.000 570.000 575.000 581.998 589.726 598.302 607.876 618.632 630.804 644.690 660.680
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 0 0 48 0 45 45 0 48 51 0 48 54 45 51 51 45 0 51 54 0 51 60 54 57 60 51 0 0 0 0 0 0 54 54 45 0 51 0 54 63 0 60 60 0 57 54 54 63 60 51 0 51 60 54 57 54 63 63 57 63 63 69 69 69 63 54 69 66 63 51 60 66 63 63 63 63 51 63 66 66 63 48 60 57 60 60 57 60 60 60 57 57 54 51 54 51 54 51 48 51 54 45 45 45
</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 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 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
</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" >
89.483 90.0 95.0 100.0 105.0 110.0 111.517 113.035 114.552 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.53 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.286 2.941 3.287 3.398 3.275 3.275 3.398 3.411 3.547 3.678 3.808 3.939 4.07 4.204 4.341 4.482 4.625 4.772 4.922 5.074 5.229 5.384 5.541 5.698 5.854 6.009 6.162 6.314 6.464 6.611 6.757 6.9 7.04 7.179 7.315 7.45 7.582 7.713 7.842 7.969 8.095 8.22 8.343 8.466 8.587 8.706 8.825 8.942 9.058 9.173 9.285 9.395 9.5 9.6 9.693 9.774 9.839 9.882 9.9 9.9 9.898 9.89 9.877 9.859 9.836 9.809 9.777 9.741 9.7 9.656 9.608 9.556 9.502 9.444 9.383 9.319 9.252 9.183 9.112 9.039 8.963 8.886 8.807 8.726 8.644 8.561 8.476 8.391 8.304 8.217 8.128 8.039 7.95 7.86 7.769 7.679 7.588 7.497 7.405 7.314 7.223 7.132 7.041 6.951 6.86 6.77 6.681 6.592 6.503 6.415 6.327 6.24 6.153 6.067 5.982 5.897 5.813 5.73 5.648 5.566 5.485 5.405 5.325 5.247 5.169 5.092 5.016 4.941 4.866 4.793 4.72 4.648 4.577 4.507 4.438 4.369 4.302 4.235 4.169 4.105 4.04 3.977 3.915 3.853 3.793 3.733 3.674 3.616 3.558 3.502 3.446 3.391 3.337 3.283 3.231 3.179 3.128 3.077 3.028 2.979 2.931 2.884 2.837 2.791 2.746 2.701 2.657 2.614 2.571 2.529 2.488 2.448 2.408 2.368 2.329 2.291 2.254 2.217 2.18 2.145 2.109 2.075 2.041 2.007 1.974 1.941

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.398" PeakHeight="110.0" Num="3" Error="0.0">
-30.505 13.159 -3.171
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.398" EndFrequency="9.9" PeakHeight="370.53" Num="5" zHalfNm="238.571" Error="7.69">
-222.497 -50.059 24.058 -10.434 2.954
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.552" Depth="0.123"/>
<TopsideChapman PeakHeight="370.53" PeakDensity="1216005.0" PeakScaleHeight="92.703" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
