<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-03 -034 19:00:00.000"
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 1 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) 19:00:00</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">
FF202603402031900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.475" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.872" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.403" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.514" 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="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.769" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="410.971" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="237.053" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="298.005" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.597" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="138.555" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="80.435" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="60.529" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="85.083" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="178.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.320" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="112">
<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 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 407.500 410.000 410.000 415.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 432.500 435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 455.000 455.000 455.000 460.000 460.000 460.000 465.000 465.000 465.000 470.000 475.000 475.000 475.000 480.000 480.000 485.000 485.000 485.000 490.000 490.000 490.000 495.000 495.000 495.000 500.000 503.333 506.667 510.000 510.000 515.000 515.000 515.000 520.000 525.000 525.000 530.000 530.000 535.000 540.000 545.000 550.000 555.000 560.000 570.000 575.000 580.000 590.000 600.000 610.000 625.000 641.777 662.182 687.536 719.886
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 54 51 54 57 57 57 57 57 0 60 60 63 63 60 60 60 63 63 63 60 60 0 63 60 60 60 60 57 57 63 60 0 63 63 60 0 63 63 63 63 60 63 66 60 63 0 63 66 57 0 66 60 63 66 63 66 57 66 63 63 66 60 66 0 63 0 60 63 66 60 66 57 60 66 63 63 66 63 63 66 63 0 0 45 57 45 57 60 60 54 60 60 60 57 54 51 51 51 51 48 51 51 54 54 51 51 45 42 0 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="27">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 270.000 275.000 280.000 285.000 285.000 290.000 295.000 300.000 305.000 305.000 309.667 314.333 319.000 323.667 328.333 333.000 337.667 342.333 347.000 351.667 356.333 361.000 365.667 370.333 375.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 48 0 0 45 48 51 0 0 48 48 0 0 0 0 51 0 51 0 0 0 54 0 51 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 1.953125 -0.390625 0.390625 -0.390625 -2.734375 0.390625 -1.953125 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.586 90.0 95.0 100.0 105.0 110.0 114.275 115.0 118.551 120.0 122.826 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 237.053 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 410.971 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.86 2.397 2.679 2.769 2.647 2.647 2.647 2.688 2.769 2.851 3.018 3.174 3.328 3.483 3.639 3.797 3.954 4.108 4.258 4.404 4.545 4.68 4.812 4.94 5.065 5.187 5.308 5.428 5.547 5.665 5.778 5.862 5.872 5.976 6.15 6.322 6.494 6.669 6.846 7.027 7.212 7.401 7.594 7.792 7.992 8.195 8.4 8.604 8.809 9.011 9.211 9.407 9.599 9.786 9.968 10.145 10.315 10.479 10.635 10.783 10.922 11.05 11.166 11.267 11.351 11.415 11.457 11.475 11.475 11.473 11.463 11.446 11.422 11.391 11.354 11.311 11.262 11.208 11.149 11.084 11.015 10.942 10.865 10.783 10.699 10.61 10.519 10.425 10.328 10.229 10.128 10.024 9.919 9.812 9.703 9.594 9.483 9.371 9.258 9.145 9.031 8.916 8.801 8.686 8.571 8.456 8.341 8.226 8.111 7.997 7.883 7.77 7.657 7.545 7.434 7.323 7.213 7.104 6.995 6.888 6.782 6.676 6.572 6.468 6.366 6.265 6.164 6.065 5.967 5.87 5.775 5.68 5.587 5.495 5.404 5.314 5.225 5.138 5.052 4.967 4.883 4.8 4.719 4.638 4.559 4.481 4.404 4.329 4.254 4.181 4.109 4.037 3.967 3.898 3.831 3.764 3.698 3.633 3.57 3.507 3.445 3.385 3.325 3.267 3.209 3.152 3.096 3.042 2.988 2.935 2.883 2.831 2.781 2.731 2.683 2.635 2.588 2.542 2.496 2.452 2.408 2.365 2.322 2.281 2.24 2.2 2.16

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.769" PeakHeight="110.0" Num="3" Error="0.0">
-29.989 12.402 -2.827
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="2.769" EndFrequency="5.872" PeakHeight="237.053" Num="5" Error="0.0">
-93.182 -31.308 13.656 -4.841 1.448
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.872" EndFrequency="11.475" PeakHeight="410.971" Num="5" zHalfNm="298.005" Error="5.352">
-153.43 -23.292 3.958 -2.067 0.913
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.826" Depth="0.122"/>
<TopsideChapman PeakHeight="410.971" PeakDensity="1633692.6" PeakScaleHeight="85.083" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
