<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 17:00:00.000"
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: 90% PACIFIC flags: 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) 17:00:00</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">
FF202602601261700009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.378" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.136" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="580.000" 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="3.236" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.288" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="376.576" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="256.425" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.989" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="149.547" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.718" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.126" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="206.630" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.130" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="88">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 345.000 345.000 345.000 345.000 345.000 350.000 355.000 357.500 360.000 360.000 362.500 365.000 365.000 370.000 370.000 370.000 370.000 370.000 375.000 380.000 382.500 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 407.500 410.000 415.000 417.500 420.000 422.500 425.000 425.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 480.000 485.000 490.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 530.000 535.000 535.000 540.000 545.000 550.000 550.000 553.333 556.667 560.000 560.000 570.000 572.500 575.000 580.000 580.000 580.000 590.000 595.000 595.000 600.877 607.789 616.034
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 0 0 0 48 54 0 0 45 54 0 54 60 54 60 60 57 54 57 51 0 57 57 54 57 51 54 54 54 54 0 0 0 48 54 48 54 0 45 51 45 45 51 54 54 57 54 54 48 60 57 57 60 60 60 57 54 54 54 54 54 57 57 57 57 51 60 54 51 48 54 0 0 57 48 54 0 54 54 57 54 51 51 51 48 51 48
</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 -1.953125 -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 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 1.953125 -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" >
89.507 90.0 95.0 100.0 105.0 110.0 112.191 114.381 115.0 116.572 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 376.576 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.176 2.801 3.131 3.236 3.114 3.114 3.148 3.236 3.373 3.539 3.688 3.829 3.966 4.1 4.234 4.368 4.503 4.639 4.775 4.913 5.052 5.192 5.332 5.473 5.615 5.756 5.897 6.038 6.178 6.318 6.457 6.595 6.732 6.869 7.004 7.139 7.273 7.406 7.538 7.67 7.801 7.931 8.061 8.191 8.321 8.451 8.581 8.711 8.842 8.973 9.104 9.236 9.369 9.501 9.634 9.764 9.89 10.006 10.098 10.147 10.15 10.148 10.14 10.125 10.104 10.076 10.043 10.003 9.959 9.91 9.855 9.797 9.734 9.667 9.596 9.522 9.444 9.364 9.28 9.194 9.106 9.015 8.923 8.828 8.732 8.635 8.536 8.436 8.335 8.234 8.131 8.028 7.925 7.821 7.717 7.612 7.508 7.404 7.3 7.196 7.093 6.989 6.887 6.785 6.683 6.582 6.482 6.382 6.283 6.185 6.088 5.992 5.896 5.802 5.708 5.616 5.524 5.434 5.344 5.256 5.168 5.082 4.997 4.913 4.83 4.748 4.667 4.587 4.508 4.431 4.355 4.279 4.205 4.132 4.06 3.989 3.919 3.85 3.782 3.715 3.65 3.585 3.521 3.459 3.397 3.337 3.277 3.218 3.161 3.104 3.048 2.993 2.939 2.886 2.834 2.783 2.732 2.683 2.634 2.586 2.539 2.493 2.448 2.403 2.359 2.316 2.274 2.232 2.192 2.151 2.112 2.073 2.035 1.998 1.961 1.925 1.89 1.855 1.821 1.787 1.755 1.722 1.691 1.659 1.629 1.599

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.236" PeakHeight="110.0" Num="3" Error="0.0">
-30.386 12.982 -3.089
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.236" EndFrequency="10.15" PeakHeight="376.576" Num="5" zHalfNm="256.425" Error="5.384">
-214.105 -72.441 33.241 -10.16 3.461
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.572" Depth="0.122"/>
<TopsideChapman PeakHeight="376.576" PeakDensity="1278194.8" PeakScaleHeight="83.126" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
