<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-31 -031 15:40:00.000"
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 F2o 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" >
2026.01.31 (031) 15:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202603101311540009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.469" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.553" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" 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="3.363" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.347" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="377.845" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="249.210" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.469" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="171.382" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.737" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="96.217" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="200.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.640" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="99">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 320.000 322.500 325.000 327.500 330.000 325.000 326.250 327.500 328.750 330.000 335.000 335.000 335.000 335.000 340.000 342.500 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 357.500 360.000 360.000 365.000 370.000 371.250 372.500 373.750 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 395.000 400.000 400.000 402.500 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 465.000 470.000 475.000 475.000 480.000 480.000 490.000 495.000 500.000 500.000 505.000 505.000 515.000 520.000 520.000 530.000 535.000 540.000 550.000 555.000 565.000 575.000 588.459 604.892 625.405 651.732 686.757 735.640
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 0 0 0 45 51 0 51 0 51 51 54 0 51 51 0 48 51 54 54 54 54 0 51 57 57 54 0 57 54 57 51 0 0 0 60 60 57 63 63 63 63 60 54 0 57 54 57 51 60 63 60 63 60 66 60 63 57 63 60 51 60 54 63 60 60 60 63 63 60 57 54 60 60 57 54 54 51 57 57 57 54 51 51 48 51 48 48 48 48 48 45 42 0 0 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 -1.953125 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 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -1.953125 -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" >
89.487 90.0 95.0 100.0 105.0 110.0 111.662 113.325 114.987 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 377.845 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.262 2.91 3.253 3.363 3.24 3.24 3.363 3.363 3.525 3.675 3.818 3.957 4.094 4.23 4.365 4.5 4.636 4.772 4.91 5.049 5.189 5.332 5.476 5.621 5.769 5.919 6.071 6.224 6.38 6.537 6.696 6.856 7.018 7.181 7.344 7.509 7.674 7.838 8.003 8.167 8.329 8.49 8.649 8.805 8.957 9.106 9.25 9.388 9.521 9.646 9.764 9.873 9.973 10.063 10.141 10.208 10.263 10.305 10.333 10.348 10.35 10.349 10.344 10.334 10.319 10.299 10.274 10.245 10.212 10.174 10.133 10.087 10.038 9.986 9.931 9.872 9.811 9.747 9.68 9.611 9.539 9.466 9.39 9.313 9.234 9.153 9.071 8.988 8.903 8.817 8.73 8.643 8.554 8.465 8.375 8.285 8.194 8.103 8.012 7.92 7.828 7.736 7.644 7.553 7.461 7.37 7.278 7.187 7.096 7.006 6.916 6.827 6.738 6.649 6.561 6.473 6.387 6.3 6.215 6.13 6.045 5.962 5.879 5.797 5.716 5.635 5.555 5.476 5.398 5.32 5.244 5.168 5.093 5.019 4.945 4.873 4.801 4.73 4.66 4.591 4.523 4.456 4.389 4.323 4.258 4.194 4.131 4.068 4.007 3.946 3.886 3.826 3.768 3.71 3.653 3.597 3.542 3.488 3.434 3.381 3.328 3.277 3.226 3.176 3.127 3.078 3.03 2.983 2.936 2.89 2.845 2.801 2.757 2.713 2.671 2.629 2.588 2.547 2.507 2.467 2.428 2.39 2.352 2.315 2.278 2.242

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.363" PeakHeight="110.0" Num="3" Error="0.0">
-30.481 13.122 -3.154
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.363" EndFrequency="10.35" PeakHeight="377.845" Num="5" zHalfNm="249.21" Error="3.557">
-240.119 -29.991 5.708 1.06 0.484
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.987" Depth="0.123"/>
<TopsideChapman PeakHeight="377.845" PeakDensity="1329063.2" PeakScaleHeight="96.217" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
