<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-03 -034 18:40:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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) 18:40:00</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">
FF202603402031840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.397" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.368" 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="11.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="10.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="550.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.882" 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="/" />
<URSI ID="92" Val="405.354" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="299.872" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.587" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="138.502" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.243" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.666" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="189.080" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="129">
<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 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 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 280.000 280.000 285.000 285.000 290.000 292.500 295.000 297.500 300.000 302.500 305.000 310.000 313.571 317.143 320.714 324.286 327.857 331.429 335.000 340.000 345.000 350.000 355.000 355.000 355.000 365.000 365.000 365.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 412.500 415.000 415.000 425.000 427.500 430.000 432.500 435.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 460.000 460.000 460.000 460.000 465.000 470.000 470.000 475.000 475.000 475.000 475.000 480.000 485.000 485.000 485.000 485.000 490.000 490.000 490.000 495.000 495.000 495.000 495.000 495.000 500.000 502.500 505.000 505.000 505.000 505.000 510.000 510.000 510.000 510.000 510.000 515.000 520.000 520.000 525.000 525.000 525.000 530.000 535.000 535.000 540.000 540.000 545.000 550.000 550.000 555.000 560.000 564.992 570.498 576.602 583.408 591.044 599.670 609.494 620.784 633.893 649.301
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 51 54 51 51 0 0 0 0 0 51 54 0 0 0 0 57 0 57 54 0 63 60 57 0 60 60 51 0 60 57 57 60 60 63 63 63 66 60 63 60 63 60 63 60 63 63 0 63 54 0 0 0 0 45 57 63 63 60 63 57 60 54 60 66 66 66 54 63 66 66 66 57 63 48 57 60 63 60 48 57 60 60 60 63 60 60 60 60 63 60 60 0 57 63 63 60 57 60 60 57 51 0 54 60 54 54 60 57 48 54 48 54 54 48 48 48 51 48 42 45 0 42 48 45 42 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 -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 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 1.171875 -0.390625 0.390625 0.390625 0.390625 1.171875 2.734375 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" >
89.566 90.0 95.0 100.0 105.0 110.0 113.754 115.0 117.507 120.0 121.261 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 405.354 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.937 2.495 2.788 2.882 2.76 2.76 2.76 2.841 2.882 2.973 3.096 3.221 3.346 3.473 3.6 3.728 3.856 3.985 4.115 4.245 4.376 4.507 4.639 4.772 4.905 5.039 5.174 5.309 5.445 5.583 5.721 5.86 6.0 6.141 6.283 6.426 6.571 6.717 6.865 7.014 7.164 7.316 7.47 7.625 7.782 7.941 8.102 8.265 8.43 8.597 8.766 8.937 9.11 9.284 9.461 9.638 9.816 9.993 10.169 10.34 10.505 10.658 10.793 10.901 10.972 11.0 11.0 10.996 10.983 10.962 10.933 10.897 10.853 10.802 10.744 10.681 10.612 10.537 10.457 10.373 10.284 10.192 10.095 9.995 9.892 9.786 9.678 9.567 9.454 9.339 9.223 9.105 8.986 8.866 8.745 8.624 8.502 8.38 8.257 8.135 8.012 7.89 7.768 7.647 7.526 7.405 7.286 7.167 7.049 6.931 6.815 6.7 6.586 6.473 6.361 6.25 6.141 6.033 5.926 5.82 5.716 5.613 5.512 5.412 5.313 5.215 5.119 5.025 4.932 4.84 4.75 4.661 4.573 4.487 4.402 4.319 4.237 4.156 4.077 3.999 3.922 3.847 3.773 3.7 3.628 3.558 3.489 3.421 3.355 3.289 3.225 3.162 3.1 3.04 2.98 2.922 2.864 2.808 2.753 2.698 2.645 2.593 2.542 2.491 2.442 2.394 2.346 2.3 2.254 2.209 2.165 2.122 2.08 2.039 1.998 1.958 1.919 1.881 1.843 1.806 1.77 1.735 1.7 1.666 1.633 1.6

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.882" PeakHeight="110.0" Num="3" Error="0.0">
-30.094 12.554 -2.894
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.882" EndFrequency="11.0" PeakHeight="405.354" Num="5" zHalfNm="299.872" Error="2.857">
-228.116 -77.182 24.528 -3.369 0.046
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.261" Depth="0.122"/>
<TopsideChapman PeakHeight="405.354" PeakDensity="1501240.8" PeakScaleHeight="76.666" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
