<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-28 -028 13:00:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2o 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" >
2026.01.28 (028) 13:00:00</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">
FF202602801281300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.361" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.902" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.000" 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="8.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.188" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.266" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="393.988" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="253.317" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.721" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="181.910" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.687" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="100.937" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="224.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="100">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 240.000 250.000 260.000 270.000 270.000 276.667 283.333 290.000 295.000 300.625 306.250 311.875 317.500 323.125 328.750 334.375 340.000 350.000 352.500 355.000 355.000 355.000 360.000 360.000 363.333 366.667 370.000 370.000 372.500 375.000 375.000 377.500 380.000 380.000 385.000 388.750 392.500 396.250 400.000 401.250 402.500 403.750 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 432.500 435.000 440.000 440.000 445.000 445.000 445.000 450.000 455.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 490.000 495.000 500.000 510.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 555.000 560.000 565.000 570.000 575.895 582.407 589.639 597.716 606.797 617.081 628.824 642.359 658.132 676.746 699.047 726.250
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 45 45 0 48 48 0 0 48 54 0 0 0 0 0 0 0 51 51 0 54 63 66 60 57 0 0 48 51 0 54 54 0 51 45 54 0 0 0 45 0 0 0 63 66 63 69 63 66 63 48 54 63 51 60 51 60 54 63 60 66 66 63 63 60 60 60 63 63 63 60 57 57 63 63 63 54 54 57 57 57 54 57 60 60 60 57 57 54 51 54 51 48 51 51 51 51 0 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 -0.390625 1.953125 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 1.953125 1.953125 2.734375 0.390625 -1.953125 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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
</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" >
89.515 90.0 95.0 100.0 105.0 110.0 112.394 114.788 115.0 117.182 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 393.988 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.144 2.759 3.084 3.188 3.066 3.066 3.077 3.188 3.257 3.383 3.51 3.64 3.772 3.906 4.042 4.179 4.317 4.457 4.597 4.737 4.877 5.017 5.157 5.296 5.435 5.573 5.71 5.846 5.981 6.115 6.249 6.381 6.513 6.643 6.773 6.902 7.03 7.158 7.284 7.41 7.535 7.659 7.783 7.906 8.027 8.148 8.268 8.387 8.505 8.621 8.735 8.847 8.957 9.063 9.166 9.264 9.356 9.44 9.516 9.582 9.634 9.672 9.694 9.7 9.7 9.697 9.689 9.677 9.661 9.641 9.616 9.589 9.557 9.522 9.484 9.443 9.398 9.351 9.301 9.249 9.194 9.137 9.077 9.016 8.952 8.887 8.82 8.751 8.681 8.609 8.537 8.463 8.387 8.311 8.234 8.157 8.078 7.999 7.919 7.839 7.758 7.677 7.595 7.514 7.432 7.35 7.268 7.186 7.104 7.022 6.94 6.858 6.777 6.696 6.615 6.534 6.454 6.374 6.295 6.216 6.137 6.059 5.981 5.904 5.828 5.752 5.677 5.602 5.528 5.454 5.381 5.309 5.237 5.166 5.096 5.027 4.958 4.89 4.822 4.755 4.689 4.624 4.559 4.495 4.432 4.369 4.308 4.247 4.186 4.127 4.068 4.009 3.952 3.895 3.839 3.783 3.729 3.675 3.621 3.569 3.517 3.465 3.415 3.365 3.315 3.267 3.218 3.171 3.124 3.078 3.033 2.988 2.944 2.9 2.857 2.814 2.772 2.731 2.69 2.65 2.611 2.572 2.533 2.495 2.458 2.421

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.188" PeakHeight="110.0" Num="3" Error="0.0">
-30.348 12.927 -3.064
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.188" EndFrequency="9.7" PeakHeight="393.988" Num="5" zHalfNm="253.317" Error="5.972">
-248.148 -43.948 20.635 -6.258 0.913
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.182" Depth="0.122"/>
<TopsideChapman PeakHeight="393.988" PeakDensity="1167369.8" PeakScaleHeight="100.937" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
