<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 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: 90% PACIFIC flags: 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" >
2026.02.06 (037) 15:00:00</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">
FF202603702061500009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.479" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.679" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" 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="3.379" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.355" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="369.076" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="226.702" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.491" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="179.112" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.898" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="101.050" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="230.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="93">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
190.000 190.000 195.000 196.667 198.333 200.000 205.000 205.000 210.000 225.000 235.000 245.000 255.000 265.000 275.000 285.000 295.000 305.000 315.000 325.000 328.125 331.250 334.375 337.500 340.625 343.750 346.875 350.000 355.000 360.000 360.000 363.750 367.500 371.250 375.000 380.000 380.000 382.500 385.000 387.500 390.000 392.500 395.000 395.000 400.000 400.000 401.667 403.333 405.000 406.667 408.333 410.000 410.000 415.000 420.000 420.000 420.000 425.000 430.000 430.000 430.000 435.000 440.000 445.000 445.000 445.000 450.000 455.000 460.000 460.000 465.000 475.000 480.000 485.000 495.000 500.000 505.000 515.000 520.000 530.000 540.000 545.000 555.714 566.429 577.143 587.857 598.571 609.286 622.702 637.053 652.440 668.978 686.802
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 51 48 0 0 45 45 57 54 51 0 0 0 0 0 0 0 0 0 48 0 0 0 0 0 0 0 48 48 57 51 0 0 0 51 45 48 0 0 0 48 0 51 51 45 48 0 0 0 0 0 54 54 0 48 54 51 51 48 54 48 51 0 48 57 51 57 57 60 60 60 57 60 57 60 60 54 54 54 51 54 54 45 0 0 48 0 45 45 57 57 54 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -1.171875 2.734375 1.953125 2.734375 -2.734375 -1.171875 2.734375 2.734375 2.734375 -0.390625 0.390625 -1.171875 0.390625 -2.734375 0.390625 -2.734375 2.734375 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 1.171875 -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 -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 -2.734375 0.390625 1.171875 -2.734375 -2.734375 0.390625 0.390625 0.390625 0.390625 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" >
89.485 90.0 95.0 100.0 105.0 110.0 111.595 113.191 114.786 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 369.076 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.273 2.924 3.269 3.379 3.256 3.256 3.379 3.384 3.511 3.654 3.812 3.979 4.149 4.317 4.48 4.638 4.789 4.934 5.075 5.211 5.343 5.472 5.598 5.722 5.843 5.963 6.082 6.199 6.315 6.431 6.546 6.66 6.774 6.887 7.0 7.114 7.227 7.34 7.452 7.565 7.678 7.79 7.902 8.013 8.123 8.232 8.34 8.445 8.547 8.646 8.74 8.828 8.908 8.979 9.04 9.089 9.124 9.145 9.15 9.15 9.147 9.14 9.129 9.113 9.094 9.072 9.046 9.016 8.983 8.947 8.909 8.867 8.823 8.776 8.726 8.674 8.621 8.565 8.507 8.447 8.385 8.322 8.258 8.192 8.124 8.056 7.986 7.915 7.844 7.771 7.698 7.624 7.549 7.474 7.398 7.322 7.246 7.169 7.092 7.015 6.938 6.861 6.783 6.706 6.629 6.552 6.475 6.398 6.322 6.245 6.169 6.094 6.019 5.944 5.869 5.795 5.721 5.648 5.576 5.504 5.432 5.361 5.29 5.22 5.151 5.082 5.014 4.947 4.88 4.814 4.748 4.683 4.619 4.555 4.492 4.43 4.368 4.307 4.247 4.187 4.128 4.07 4.012 3.955 3.899 3.843 3.788 3.734 3.68 3.627 3.575 3.523 3.472 3.422 3.372 3.323 3.275 3.227 3.18 3.133 3.087 3.042 2.997 2.953 2.91 2.867 2.824 2.782 2.741 2.701 2.66 2.621 2.582 2.543 2.506 2.468 2.431 2.395 2.359 2.324 2.289 2.255 2.221 2.188 2.155 2.122

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.379" PeakHeight="110.0" Num="3" Error="0.0">
-30.492 13.139 -3.162
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.379" EndFrequency="9.15" PeakHeight="369.076" Num="5" zHalfNm="226.702" Error="12.058">
-232.279 -38.581 21.561 -3.451 -1.54
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.786" Depth="0.123"/>
<TopsideChapman PeakHeight="369.076" PeakDensity="1038740.7" PeakScaleHeight="101.05" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
