<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-27 -027 15:40:00.000"
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 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" >
2026.01.27 (027) 15:40:00</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">
FF202602701271540009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.222" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.219" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="7.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="515.000" 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="3.357" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.345" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="439.846" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="254.076" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.468" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="240.049" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.813" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="132.549" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="283.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.600" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="73">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 340.000 346.250 352.500 358.750 365.000 371.250 377.500 383.750 390.000 395.000 400.000 400.000 403.333 406.667 410.000 415.000 415.000 420.000 425.000 425.000 430.000 435.000 437.500 440.000 445.000 450.000 455.000 460.000 460.000 465.000 470.000 475.000 475.000 475.000 480.000 485.000 495.000 495.000 500.000 505.000 510.000 510.000 515.000 525.000 535.000 535.000 545.000 550.000 555.000 565.000 575.000 585.000 595.000 605.000 615.000 625.000 635.000 650.000 660.000 668.564 677.810 687.824 698.705 710.572 723.564 737.849 753.631 771.157 790.734 812.745 837.673 866.140
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 48 0 51 0 48 0 51 51 45 48 0 0 48 51 45 54 57 48 54 54 0 48 57 57 54 54 54 57 54 51 57 57 57 57 48 60 60 57 57 57 57 60 48 57 60 57 60 57 60 60 60 60 57 57 54 54 51 51 54 51 51 51 51 54 48 48 0 0 0 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 1.171875 0.390625 0.390625 0.390625 0.390625 2.734375 0.390625 -0.390625 0.390625 0.390625 0.390625 -1.171875 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 -1.171875 -1.171875 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" >
89.488 90.0 95.0 100.0 105.0 110.0 111.687 113.375 115.0 115.062 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 439.846 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.258 2.905 3.248 3.357 3.234 3.234 3.352 3.357 3.474 3.582 3.685 3.785 3.884 3.984 4.084 4.185 4.288 4.393 4.5 4.609 4.721 4.835 4.95 5.067 5.186 5.305 5.424 5.544 5.663 5.781 5.897 6.012 6.126 6.237 6.347 6.454 6.56 6.663 6.765 6.864 6.962 7.058 7.152 7.245 7.336 7.425 7.513 7.599 7.684 7.768 7.85 7.932 8.011 8.09 8.167 8.243 8.318 8.391 8.463 8.533 8.6 8.666 8.73 8.79 8.847 8.901 8.949 8.993 9.03 9.06 9.082 9.096 9.1 9.1 9.099 9.095 9.089 9.08 9.069 9.056 9.041 9.024 9.004 8.983 8.96 8.935 8.908 8.879 8.849 8.817 8.783 8.748 8.712 8.674 8.635 8.595 8.553 8.51 8.466 8.421 8.375 8.328 8.28 8.231 8.182 8.131 8.08 8.028 7.976 7.923 7.869 7.815 7.76 7.705 7.649 7.593 7.536 7.48 7.422 7.365 7.307 7.25 7.192 7.133 7.075 7.017 6.958 6.9 6.841 6.782 6.724 6.665 6.607 6.548 6.49 6.432 6.373 6.315 6.257 6.2 6.142 6.085 6.027 5.97 5.914 5.857 5.801 5.745 5.689 5.634 5.578 5.523 5.469 5.415 5.361 5.307 5.254 5.2 5.148 5.095 5.043 4.992 4.941 4.89 4.839 4.789 4.739 4.69 4.641 4.592 4.544 4.496 4.448 4.401 4.354 4.308 4.262 4.216 4.171 4.126 4.082 4.038 3.994 3.951 3.908 3.865

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.357" PeakHeight="110.0" Num="3" Error="0.0">
-30.477 13.116 -3.151
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.357" EndFrequency="9.1" PeakHeight="439.846" Num="5" zHalfNm="254.076" Error="8.196">
-300.289 -40.033 23.134 -12.046 4.45
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.062" Depth="0.123"/>
<TopsideChapman PeakHeight="439.846" PeakDensity="1027419.4" PeakScaleHeight="132.549" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
