<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-01 -032 17:40:00.000"
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" >
2026.02.01 (032) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603202011740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.483" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.319" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="535.000" 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="3.133" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.239" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="373.255" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.627" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.365" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="126.607" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.822" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.883" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="188.170" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="95">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.35 10.4 10.45 10.5 10.55 10.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 375.000 375.000 375.000 375.000 376.000 377.000 378.000 379.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 465.000 470.000 470.000 470.000 480.000 480.000 485.000 485.000 485.000 485.000 490.000 491.667 493.333 495.000 495.000 500.000 500.000 505.000 505.000 505.000 510.000 510.000 515.000 517.500 520.000 525.000 525.000 530.000 530.000 535.000 535.000 540.000 545.000 550.000 555.000 560.000 565.000 573.548 584.168
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 0 48 48 0 0 0 0 48 48 51 54 54 51 54 57 57 60 0 60 57 57 60 60 57 60 57 60 63 60 63 63 57 63 57 0 66 60 66 63 63 0 63 66 60 63 60 63 57 60 54 57 54 60 63 60 48 57 51 54 51 54 57 57 60 0 0 60 54 54 57 57 57 54 57 54 54 45 54 48 54 51 54 51 51 51 48 48 48 48 48 42 0
</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 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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
</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" >
89.523 90.0 95.0 100.0 105.0 110.0 112.634 115.0 115.269 117.903 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.255 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.107 2.712 3.031 3.133 3.011 3.011 3.011 3.133 3.221 3.41 3.581 3.741 3.893 4.04 4.182 4.322 4.458 4.593 4.727 4.859 4.991 5.122 5.253 5.383 5.514 5.645 5.776 5.907 6.04 6.173 6.306 6.441 6.577 6.714 6.852 6.991 7.132 7.275 7.419 7.565 7.713 7.863 8.015 8.17 8.327 8.487 8.65 8.815 8.984 9.155 9.329 9.506 9.685 9.865 10.043 10.216 10.374 10.504 10.584 10.6 10.599 10.591 10.573 10.547 10.511 10.468 10.417 10.359 10.294 10.223 10.146 10.063 9.976 9.883 9.786 9.686 9.582 9.474 9.364 9.25 9.135 9.017 8.898 8.777 8.655 8.531 8.407 8.282 8.157 8.031 7.905 7.779 7.654 7.528 7.403 7.279 7.155 7.032 6.909 6.788 6.668 6.548 6.43 6.313 6.197 6.083 5.97 5.858 5.748 5.639 5.531 5.425 5.321 5.218 5.116 5.016 4.918 4.821 4.725 4.632 4.539 4.449 4.359 4.272 4.186 4.101 4.018 3.936 3.856 3.777 3.7 3.624 3.549 3.476 3.404 3.334 3.265 3.197 3.131 3.065 3.002 2.939 2.877 2.817 2.758 2.7 2.644 2.588 2.534 2.48 2.428 2.377 2.327 2.278 2.229 2.182 2.136 2.091 2.046 2.003 1.961 1.919 1.878 1.838 1.799 1.761 1.723 1.687 1.651 1.616 1.581 1.547 1.514 1.482 1.45 1.419 1.389 1.359 1.33 1.302 1.274 1.247 1.22 1.194 1.168 1.143

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.133" PeakHeight="110.0" Num="3" Error="0.0">
-30.304 12.862 -3.035
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.133" EndFrequency="10.6" PeakHeight="373.255" Num="5" zHalfNm="272.627" Error="3.29">
-202.8 -79.552 28.931 -2.082 0.151
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.903" Depth="0.122"/>
<TopsideChapman PeakHeight="373.255" PeakDensity="1394044.6" PeakScaleHeight="71.883" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
