<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 12:40:00.000"
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="15.0">
<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 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" >
2026.10.16 (289) 12:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202628910161240009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.775" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.046" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" 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="3.240" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.290" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="329.960" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="246.350" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.040" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="110.461" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.757" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.694" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.140" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="110">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 322.500 325.000 325.000 325.000 325.000 325.000 325.000 326.346 327.692 329.038 330.385 331.731 333.077 334.423 335.769 337.115 338.462 339.808 341.154 342.500 343.846 345.192 346.538 347.885 349.231 350.577 351.923 353.269 354.615 355.962 357.308 358.654 360.000 361.346 362.692 364.038 365.385 366.731 368.077 369.423 370.769 372.115 373.462 374.808 376.154 377.500 378.846 380.192 381.538 382.885 384.231 385.577 386.923 388.269 389.615 390.962 392.308 393.654 395.000 396.346 397.692 399.038 400.385 401.731 403.077 404.423 405.769 407.115 408.462 409.808 411.154 412.500 413.846 415.192 416.538 417.885 419.231 420.577 421.923 423.269 424.615 425.962 427.308 428.654 430.000 440.000 440.000 440.000 450.000 455.000 458.065 461.793 466.425 472.337 480.142 490.926 506.793 532.446 580.976
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 63 63 66 66 66 66 0 66 66 0 69 72 72 69 66 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 45 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 60 60 57 51 57 60 51 60 54 48 57 57 45 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 1.171875 0.390625 -0.390625 -0.390625 0.390625 -1.953125 -1.171875 -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 1.171875 1.171875
</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" >
89.506 90.0 95.0 100.0 105.0 110.0 112.175 114.349 115.0 116.524 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 329.96 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.179 2.804 3.135 3.24 3.118 3.118 3.155 3.24 3.395 3.614 3.823 4.024 4.218 4.405 4.588 4.767 4.944 5.119 5.293 5.466 5.639 5.813 5.988 6.165 6.344 6.525 6.708 6.895 7.086 7.281 7.48 7.684 7.893 8.108 8.329 8.556 8.789 9.028 9.274 9.524 9.778 10.034 10.287 10.535 10.771 10.988 11.179 11.336 11.453 11.526 11.55 11.55 11.543 11.522 11.488 11.443 11.385 11.317 11.24 11.153 11.057 10.953 10.843 10.725 10.602 10.473 10.34 10.202 10.06 9.916 9.768 9.618 9.465 9.312 9.156 9.0 8.843 8.686 8.529 8.372 8.215 8.059 7.903 7.749 7.596 7.443 7.293 7.143 6.996 6.85 6.706 6.563 6.423 6.285 6.148 6.014 5.882 5.752 5.624 5.499 5.375 5.254 5.135 5.018 4.904 4.791 4.681 4.573 4.467 4.363 4.262 4.162 4.065 3.969 3.876 3.784 3.695 3.607 3.522 3.438 3.356 3.276 3.198 3.121 3.047 2.973 2.902 2.832 2.764 2.697 2.632 2.569 2.507 2.446 2.387 2.329 2.272 2.217 2.163 2.111 2.059 2.009 1.96 1.913 1.866 1.821 1.776 1.733 1.69 1.649 1.609 1.57 1.531 1.494 1.457 1.422 1.387 1.353 1.32 1.287 1.256 1.225 1.195 1.166 1.137 1.109 1.082 1.055 1.029 1.004 0.98 0.956 0.932 0.909 0.887 0.865 0.844 0.823 0.803 0.783 0.764 0.745 0.727 0.709 0.692 0.675

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.24" PeakHeight="110.0" Num="3" Error="0.0">
-30.389 12.986 -3.091
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.24" EndFrequency="11.55" PeakHeight="329.96" Num="5" zHalfNm="246.35" Error="2.452">
-178.761 -49.052 12.548 3.28 -1.451
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.524" Depth="0.122"/>
<TopsideChapman PeakHeight="329.96" PeakDensity="1655117.9" PeakScaleHeight="62.694" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
