<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 10:40:00.000"
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="1 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" >
2026.01.26 (026) 10:40:00</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">
FF202602601261040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="8.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.069" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.164" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.100" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.500" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.610" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="105.084" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="105.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="335.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.481" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="296.121" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="207.454" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.579" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.650" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="125.539" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.845" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.431" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="113.540" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.160" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="87">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 245.000 242.500 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 247.500 250.000 252.500 255.000 255.000 255.000 255.000 260.000 261.111 262.222 263.333 264.444 265.556 266.667 267.778 268.889 270.000 275.000 275.833 276.667 277.500 278.333 279.167 280.000 280.000 285.000 285.000 286.667 288.333 290.000 290.000 290.000 290.000 295.000 295.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 325.000 330.000 330.000 335.000 335.000 335.000 345.000 350.000 355.000 355.000 360.000 365.000 370.000 380.000 385.000 395.000 405.000 415.000 430.000 451.580 481.485 525.679 597.621
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 45 0 63 51 60 0 60 0 60 60 57 57 57 51 0 57 0 0 57 0 54 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 0 63 66 54 60 0 0 54 60 63 66 60 63 51 57 63 66 60 66 66 63 69 69 69 69 66 69 66 60 66 63 69 66 66 63 60 69 69 66 66 69 66 69 69 66 66 66 57 54 51
</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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.084 106.789 109.116
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 105.000 105.000 105.000 107.500 110.000 110.000 110.000 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 63 63 0 51 0 57 0 54
</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
</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" >
89.617 90.0 95.0 100.0 105.0 110.0 115.0 115.677 120.0 121.354 125.0 127.031 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 296.121 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.753 2.26 2.525 2.61 2.509 2.479 2.479 2.479 2.563 2.61 2.723 2.911 3.094 3.273 3.45 3.626 3.803 3.982 4.165 4.353 4.548 4.752 4.965 5.189 5.425 5.673 5.931 6.195 6.459 6.714 6.952 7.167 7.357 7.523 7.665 7.785 7.888 7.973 8.043 8.098 8.142 8.172 8.192 8.2 8.2 8.198 8.188 8.17 8.146 8.115 8.077 8.034 7.985 7.93 7.871 7.808 7.74 7.668 7.593 7.514 7.432 7.348 7.261 7.172 7.082 6.989 6.895 6.799 6.703 6.606 6.508 6.409 6.31 6.211 6.111 6.012 5.913 5.814 5.715 5.617 5.519 5.422 5.326 5.23 5.135 5.041 4.948 4.856 4.765 4.675 4.586 4.498 4.411 4.326 4.242 4.158 4.076 3.996 3.916 3.838 3.761 3.685 3.611 3.537 3.465 3.394 3.325 3.256 3.189 3.123 3.058 2.995 2.932 2.871 2.811 2.752 2.694 2.637 2.582 2.527 2.474 2.421 2.37 2.319 2.27 2.222 2.174 2.128 2.082 2.038 1.994 1.951 1.909 1.868 1.828 1.789 1.75 1.712 1.675 1.639 1.604 1.569 1.535 1.502 1.469 1.437 1.406 1.376 1.346 1.316 1.288 1.26 1.232 1.206 1.179 1.154 1.129 1.104 1.08 1.056 1.033 1.011 0.989 0.967 0.946 0.925 0.905 0.885 0.866 0.847 0.829 0.81 0.793 0.775 0.758 0.742 0.726 0.71 0.694 0.679 0.664 0.65 0.635 0.621 0.608 0.595

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.61" PeakHeight="110.0" Num="3" Error="0.0">
-29.831 12.176 -2.728
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.61" EndFrequency="8.2" PeakHeight="296.121" Num="5" zHalfNm="207.454" Error="2.085">
-172.981 10.789 -12.977 7.545 -1.466
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.031" Depth="0.131"/>
<TopsideChapman PeakHeight="296.121" PeakDensity="834243.2" PeakScaleHeight="70.431" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
