<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 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 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" >
2026.01.29 (029) 18:40:00</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">
FF202602901291840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.329" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.758" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="9.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="586.250" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.873" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="408.168" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="279.180" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.317" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="169.020" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.881" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="92.317" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="210.660" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="123">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.1 10.15 10.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 235.000 240.000 245.000 250.000 250.000 255.000 257.500 260.000 265.000 270.000 270.000 273.333 276.667 280.000 290.000 292.500 295.000 300.000 300.000 305.000 310.000 315.000 320.000 325.000 330.000 335.000 335.000 340.000 342.500 345.000 350.000 355.000 355.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 371.667 373.333 375.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 393.333 396.667 400.000 400.000 405.000 405.000 410.000 410.000 412.500 415.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 485.000 485.000 490.000 490.000 500.000 505.000 505.000 510.000 515.000 515.000 520.000 525.000 530.000 535.000 535.000 540.000 540.000 545.000 550.000 555.000 560.000 565.000 570.000 570.000 575.000 575.000 578.750 582.500 586.250 595.441 605.361 616.098 627.759 640.469 654.375 669.654 686.520 705.236
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 48 51 51 48 48 0 48 51 51 54 0 0 48 57 0 54 57 54 0 0 60 60 0 51 45 51 51 0 60 0 54 60 57 0 0 0 54 57 54 0 0 45 48 51 57 60 63 60 51 0 0 60 54 63 66 60 63 0 66 54 60 63 60 66 63 63 60 63 57 60 57 60 60 63 63 57 60 57 66 69 66 66 63 63 63 63 60 57 57 57 57 54 57 63 66 63 57 63 60 57 57 54 51 51 51 48 54 51 51 0 0 0 0 0 0 0 0 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -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 1.171875 1.953125 0.390625 1.171875 2.734375 -0.390625 -2.734375 -1.171875 -1.171875 -2.734375 -1.953125 -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" >
89.568 90.0 95.0 100.0 105.0 110.0 113.795 115.0 117.59 120.0 121.385 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 408.168 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.931 2.487 2.78 2.873 2.751 2.751 2.751 2.828 2.873 2.952 3.065 3.182 3.304 3.43 3.56 3.693 3.83 3.969 4.11 4.253 4.397 4.542 4.687 4.833 4.978 5.123 5.268 5.413 5.556 5.699 5.842 5.984 6.125 6.266 6.406 6.545 6.684 6.822 6.96 7.098 7.235 7.372 7.508 7.645 7.781 7.917 8.053 8.188 8.323 8.459 8.593 8.728 8.861 8.994 9.126 9.257 9.385 9.51 9.632 9.748 9.857 9.957 10.044 10.115 10.166 10.195 10.2 10.2 10.195 10.184 10.168 10.147 10.121 10.09 10.055 10.015 9.971 9.924 9.872 9.817 9.758 9.697 9.632 9.565 9.494 9.422 9.347 9.27 9.191 9.11 9.027 8.943 8.857 8.77 8.682 8.592 8.502 8.411 8.319 8.227 8.134 8.041 7.947 7.853 7.759 7.664 7.57 7.476 7.382 7.287 7.194 7.1 7.007 6.914 6.822 6.73 6.638 6.547 6.457 6.367 6.278 6.189 6.102 6.015 5.928 5.843 5.758 5.674 5.591 5.508 5.427 5.346 5.266 5.187 5.109 5.032 4.956 4.88 4.806 4.732 4.66 4.588 4.517 4.447 4.378 4.309 4.242 4.175 4.11 4.045 3.981 3.918 3.856 3.795 3.735 3.675 3.617 3.559 3.502 3.446 3.39 3.336 3.282 3.229 3.177 3.126 3.075 3.025 2.976 2.928 2.88 2.833 2.787 2.741 2.697 2.652 2.609 2.566 2.524 2.483 2.442 2.402 2.362 2.324 2.285 2.248

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.873" PeakHeight="110.0" Num="3" Error="0.0">
-30.086 12.543 -2.889
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.873" EndFrequency="10.2" PeakHeight="408.168" Num="5" zHalfNm="279.18" Error="5.035">
-248.894 -55.906 25.156 -8.05 0.911
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.385" Depth="0.122"/>
<TopsideChapman PeakHeight="408.168" PeakDensity="1290818.9" PeakScaleHeight="92.317" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
