<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-03 -034 21:20:00.000"
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 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" >
2026.02.03 (034) 21:20:00</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">
FF202603402032120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.256" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.670" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" 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="1.020" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="441.536" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="333.387" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.138" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="155.243" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.554" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.763" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="161.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.750" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="148">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 310.000 310.000 310.000 310.000 311.250 312.500 313.750 315.000 315.000 320.000 320.000 320.000 320.000 321.667 323.333 325.000 326.250 327.500 328.750 330.000 335.000 335.000 335.000 335.000 336.667 338.333 340.000 345.000 347.000 349.000 351.000 353.000 355.000 357.000 359.000 361.000 363.000 365.000 367.000 369.000 371.000 373.000 375.000 375.000 377.500 380.000 382.500 385.000 387.000 389.000 391.000 393.000 395.000 400.000 400.000 403.333 406.667 410.000 410.000 412.500 415.000 425.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 442.500 445.000 450.000 453.750 457.500 461.250 465.000 465.000 465.000 470.000 470.000 475.000 485.000 485.000 490.000 495.000 495.000 500.000 500.000 505.000 505.000 505.000 515.000 515.000 520.000 520.000 525.000 525.000 530.000 535.000 535.000 540.000 545.000 550.000 555.000 560.000 565.000 570.000 570.000 575.000 575.000 580.000 585.000 590.000 595.000 600.000 605.000 610.000 615.000 620.000 625.000 630.000 636.915 644.419 652.592 661.527 671.335 682.152
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 0 63 63 63 0 60 63 66 63 60 0 66 69 0 69 66 60 72 72 69 69 0 69 0 0 0 66 66 0 0 0 66 0 0 57 0 66 0 69 66 0 0 66 0 0 0 63 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 66 0 69 0 63 0 0 0 0 66 63 66 0 0 63 66 0 66 51 63 66 63 66 66 57 66 0 66 63 0 0 0 60 66 63 66 66 66 54 66 60 54 66 57 66 63 66 66 60 66 63 66 66 66 66 69 69 66 69 66 63 63 57 54 66 63 60 60 60 60 60 60 60 60 0 0 60 60 0 60 48 48 0 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 -1.171875 -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 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 2.734375 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.25 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.54 130.0 135.0 140.0 143.079 145.0 150.0 155.0 159.619 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 441.536 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.679 0.884 0.987 1.02 1.003 0.95 0.855 0.815 0.815 0.815 0.815 0.815 0.839 0.901 0.963 1.02 1.029 1.129 1.218 1.305 1.395 1.489 1.589 1.698 1.819 1.953 2.104 2.276 2.47 2.686 2.921 3.169 3.422 3.673 3.917 4.153 4.381 4.6 4.812 5.017 5.215 5.409 5.597 5.782 5.963 6.141 6.316 6.488 6.659 6.827 6.994 7.16 7.324 7.487 7.65 7.812 7.973 8.133 8.292 8.451 8.609 8.766 8.922 9.075 9.226 9.372 9.513 9.647 9.769 9.875 9.961 10.021 10.048 10.05 10.048 10.038 10.021 9.996 9.964 9.926 9.881 9.83 9.773 9.711 9.644 9.573 9.497 9.417 9.333 9.246 9.156 9.062 8.966 8.868 8.767 8.665 8.561 8.455 8.348 8.239 8.13 8.02 7.909 7.798 7.687 7.575 7.463 7.352 7.24 7.129 7.018 6.907 6.797 6.688 6.579 6.471 6.364 6.258 6.152 6.048 5.944 5.842 5.741 5.64 5.541 5.443 5.347 5.251 5.157 5.064 4.972 4.882 4.792 4.704 4.618 4.532 4.448 4.365 4.284 4.204 4.125 4.047 3.97 3.895 3.821 3.748 3.677 3.606 3.537 3.469 3.402 3.337 3.272 3.209 3.147 3.086 3.026 2.967 2.909 2.852 2.796 2.742 2.688 2.635 2.583 2.533 2.483 2.434 2.386 2.339 2.293 2.247 2.203 2.159 2.116 2.074 2.033 1.993 1.953 1.914 1.876 1.839 1.802 1.767 1.731 1.697

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.02" PeakHeight="110.0" Num="3" Error="0.0">
-26.592 8.091 -1.249
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.02" EndFrequency="10.05" PeakHeight="441.536" Num="5" zHalfNm="333.387" Error="7.082">
-270.061 -26.928 29.726 -23.264 8.61
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="49.619" Depth="0.205"/>
<TopsideChapman PeakHeight="441.536" PeakDensity="1253132.8" PeakScaleHeight="76.763" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
