<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-10 -041 18:20:00.000"
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 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" >
2026.02.10 (041) 18:20:00</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">
FF202604102101820009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.471" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.563" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.000" 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="34" Val="115.000" Name="h`Es" 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="10.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="515.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.988" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.168" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="383.145" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.797" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.545" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.700" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="152.150" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.333" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.951" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="187.560" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="115">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 295.000 296.667 298.333 300.000 301.667 303.333 305.000 310.000 312.500 315.000 315.000 320.000 325.000 326.250 327.500 328.750 330.000 330.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 382.500 385.000 390.000 390.000 390.000 395.000 395.000 395.000 397.500 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 465.000 470.000 470.000 475.000 475.000 475.000 475.000 480.000 485.000 490.000 490.000 495.000 495.000 500.000 500.000 505.000 510.000 515.000 515.000 520.000 525.000 535.000 540.000 545.871 552.519 560.112 568.864 579.065 591.105 605.531 623.131 645.083 673.227
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 0 0 0 0 54 54 0 54 54 54 45 0 0 0 57 57 54 57 51 57 57 48 0 54 57 57 57 60 60 54 60 57 54 54 60 48 54 57 60 57 60 51 57 45 54 60 48 57 60 0 60 48 57 60 57 63 54 60 63 57 63 57 63 54 63 63 60 63 60 63 60 63 60 63 60 63 57 63 63 63 51 60 48 57 60 60 60 54 45 57 48 57 51 57 57 54 51 54 54 51 48 51 51 48 51 51 48 48 48 0 42 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 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -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 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="19">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 125.000 125.000 125.000 123.750 122.500 121.250 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 51 54 0 51 0 51 48 0 54 0 60 0 0 0 63 63 60
</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
</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" >
89.547 90.0 95.0 100.0 105.0 110.0 113.27 115.0 116.54 119.81 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 383.145 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.009 2.586 2.891 2.988 2.866 2.866 2.866 2.988 2.994 3.15 3.298 3.443 3.585 3.726 3.867 4.008 4.15 4.294 4.438 4.584 4.732 4.881 5.032 5.184 5.338 5.494 5.652 5.811 5.971 6.133 6.297 6.461 6.627 6.794 6.962 7.131 7.301 7.471 7.643 7.814 7.986 8.159 8.331 8.503 8.675 8.846 9.017 9.185 9.352 9.516 9.677 9.834 9.984 10.128 10.263 10.386 10.496 10.59 10.664 10.716 10.745 10.75 10.749 10.743 10.73 10.709 10.683 10.65 10.611 10.567 10.517 10.462 10.402 10.338 10.269 10.197 10.121 10.041 9.958 9.872 9.783 9.692 9.598 9.502 9.404 9.304 9.203 9.1 8.996 8.89 8.784 8.677 8.569 8.461 8.353 8.244 8.134 8.025 7.916 7.806 7.697 7.589 7.48 7.372 7.265 7.158 7.051 6.946 6.84 6.736 6.633 6.53 6.428 6.328 6.228 6.129 6.031 5.934 5.838 5.743 5.65 5.557 5.465 5.375 5.286 5.198 5.11 5.025 4.94 4.856 4.774 4.693 4.612 4.533 4.455 4.379 4.303 4.229 4.155 4.083 4.012 3.942 3.873 3.805 3.738 3.672 3.607 3.544 3.481 3.419 3.359 3.299 3.24 3.182 3.126 3.07 3.015 2.961 2.908 2.856 2.804 2.754 2.704 2.656 2.608 2.561 2.515 2.469 2.424 2.381 2.337 2.295 2.253 2.213 2.172 2.133 2.094 2.056 2.019 1.982 1.946 1.91 1.876 1.841 1.808 1.775

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.988" PeakHeight="110.0" Num="3" Error="0.0">
-30.185 12.687 -2.955
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.988" EndFrequency="10.75" PeakHeight="383.145" Num="5" zHalfNm="268.797" Error="2.259">
-229.874 -47.17 15.218 -2.439 0.93
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.81" Depth="0.122"/>
<TopsideChapman PeakHeight="383.145" PeakDensity="1433777.9" PeakScaleHeight="83.951" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
