<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-22 -053 15:40:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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) 15:40:00</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">
FF202605302221540009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.351" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.212" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="190.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="190.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="550.000" 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="3.390" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.360" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="392.907" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="255.320" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.654" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="175.536" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.702" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="97.878" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="226.070" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.320" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="120">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
190.000 192.500 195.000 197.500 200.000 202.500 205.000 210.000 217.500 225.000 250.000 256.000 262.000 268.000 274.000 280.000 285.000 295.000 295.000 305.000 315.000 315.000 320.000 325.000 330.000 330.000 332.500 335.000 337.500 340.000 340.000 340.000 345.000 345.000 345.000 350.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 382.500 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 425.000 427.500 430.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 495.000 500.000 500.000 505.000 505.000 505.000 515.000 515.000 520.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 550.000 560.000 565.000 570.000 575.000 585.000 595.000 605.000 615.000 625.000 635.000 645.000 657.113 670.127 684.146 699.290
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 0 48 0 48 45 0 51 48 0 0 45 0 51 48 54 54 0 51 54 54 48 48 54 0 45 0 63 60 54 63 54 51 0 57 60 63 54 63 0 60 63 60 63 63 48 45 66 60 66 0 63 60 63 60 66 60 63 54 57 60 69 57 63 60 51 57 0 48 51 51 63 54 54 63 63 60 69 72 66 60 66 60 54 57 54 51 57 63 60 48 0 45 48 45 54 54 60 60 48 51 51 60 60 60 51 51 0 0 0 0 0 42 45 0 48 42 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 2.734375 -0.390625 0.390625 -1.171875 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 2.734375 -2.734375 -1.171875 -1.953125 -1.171875 -0.390625 0.390625 1.953125 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" >
89.484 90.0 95.0 100.0 105.0 110.0 111.55 113.101 114.651 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 392.907 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.281 2.934 3.28 3.39 3.267 3.267 3.39 3.4 3.537 3.675 3.814 3.953 4.092 4.233 4.374 4.516 4.658 4.8 4.942 5.084 5.226 5.368 5.508 5.649 5.788 5.927 6.065 6.203 6.339 6.475 6.61 6.744 6.878 7.011 7.143 7.275 7.406 7.536 7.667 7.796 7.925 8.054 8.182 8.31 8.438 8.565 8.692 8.818 8.943 9.068 9.192 9.314 9.435 9.554 9.67 9.782 9.889 9.989 10.081 10.16 10.225 10.271 10.296 10.3 10.3 10.295 10.285 10.27 10.251 10.227 10.199 10.167 10.131 10.091 10.047 10.0 9.95 9.896 9.84 9.78 9.718 9.654 9.587 9.518 9.447 9.373 9.298 9.222 9.143 9.064 8.983 8.9 8.817 8.733 8.647 8.561 8.474 8.387 8.299 8.21 8.121 8.032 7.942 7.853 7.763 7.673 7.583 7.493 7.404 7.314 7.225 7.136 7.047 6.959 6.871 6.783 6.696 6.61 6.524 6.438 6.353 6.269 6.185 6.102 6.019 5.938 5.857 5.776 5.696 5.618 5.539 5.462 5.385 5.309 5.234 5.16 5.086 5.014 4.942 4.87 4.8 4.731 4.662 4.594 4.527 4.46 4.395 4.33 4.266 4.203 4.141 4.079 4.019 3.959 3.899 3.841 3.783 3.727 3.671 3.615 3.561 3.507 3.454 3.401 3.35 3.299 3.248 3.199 3.15 3.102 3.054 3.008 2.961 2.916 2.871 2.827 2.784 2.741 2.698 2.657 2.616 2.575 2.535 2.496 2.457 2.419

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.39" PeakHeight="110.0" Num="3" Error="0.0">
-30.5 13.151 -3.167
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.39" EndFrequency="10.3" PeakHeight="392.907" Num="5" zHalfNm="255.32" Error="9.316">
-242.942 -54.437 24.793 -6.744 1.074
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.651" Depth="0.123"/>
<TopsideChapman PeakHeight="392.907" PeakDensity="1316253.1" PeakScaleHeight="97.878" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
