<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 14:20:00.000"
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 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" >
2026.01.26 (026) 14:20:00</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">
FF202602601261420009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.236" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.363" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="360.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" 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="8.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.340" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.337" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="409.438" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="258.656" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.046" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="190.624" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.243" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="104.901" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="244.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.320" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="83">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 360.000 362.500 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 382.500 385.000 385.000 390.000 390.000 395.000 400.000 400.000 400.000 405.000 410.000 410.000 415.000 420.000 425.000 430.000 430.000 435.000 440.000 445.000 455.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 485.000 495.000 500.000 505.000 510.000 515.000 525.000 530.000 540.000 545.000 550.000 555.000 565.000 570.000 570.000 575.000 580.000 585.000 590.000 590.000 600.000 605.000 605.000 610.000 615.000 620.000 625.000 635.000 640.000 645.000 655.000 660.000 665.000 674.843 686.080 699.029 714.114 731.912
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 51 0 54 54 54 51 54 54 57 57 54 54 57 54 54 57 0 57 57 60 57 60 51 60 60 60 57 54 57 60 60 57 57 57 57 57 51 60 60 60 60 57 57 57 57 57 57 57 54 54 54 54 48 54 54 54 48 51 51 51 51 51 51 54 51 48 48 48 48 51 48 45 48 48 42 48 45 45 42 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 2.734375
</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" >
89.491 90.0 95.0 100.0 105.0 110.0 111.758 113.517 115.0 115.275 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 409.438 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.247 2.891 3.231 3.34 3.217 3.217 3.321 3.34 3.496 3.635 3.761 3.883 4.001 4.12 4.238 4.358 4.479 4.603 4.728 4.856 4.987 5.119 5.253 5.389 5.526 5.663 5.8 5.937 6.073 6.208 6.341 6.473 6.603 6.731 6.857 6.981 7.104 7.224 7.343 7.46 7.575 7.689 7.801 7.912 8.022 8.131 8.238 8.345 8.451 8.556 8.66 8.763 8.866 8.968 9.07 9.17 9.27 9.369 9.467 9.562 9.655 9.743 9.825 9.896 9.953 9.989 10.0 10.0 9.997 9.99 9.979 9.964 9.945 9.922 9.896 9.866 9.833 9.796 9.757 9.715 9.669 9.621 9.571 9.518 9.463 9.406 9.346 9.285 9.221 9.157 9.09 9.022 8.952 8.881 8.809 8.736 8.662 8.586 8.51 8.433 8.356 8.277 8.198 8.119 8.039 7.959 7.878 7.797 7.716 7.635 7.553 7.472 7.391 7.309 7.228 7.147 7.066 6.985 6.905 6.824 6.744 6.665 6.586 6.507 6.428 6.35 6.272 6.195 6.119 6.043 5.967 5.892 5.817 5.744 5.67 5.598 5.525 5.454 5.383 5.313 5.243 5.174 5.106 5.038 4.972 4.905 4.84 4.775 4.71 4.647 4.584 4.522 4.46 4.4 4.339 4.28 4.221 4.163 4.106 4.049 3.993 3.937 3.883 3.828 3.775 3.722 3.67 3.619 3.568 3.517 3.468 3.419 3.371 3.323 3.276 3.229 3.183 3.138 3.094 3.049 3.006 2.963 2.921 2.879 2.838 2.797

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.34" PeakHeight="110.0" Num="3" Error="0.0">
-30.465 13.098 -3.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.34" EndFrequency="10.0" PeakHeight="409.438" Num="5" zHalfNm="258.656" Error="6.984">
-255.33 -63.043 32.873 -13.739 5.076
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.275" Depth="0.123"/>
<TopsideChapman PeakHeight="409.438" PeakDensity="1240694.8" PeakScaleHeight="104.901" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
