<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 19:30:00.000"
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" >
2026.10.17 (290) 19:30:00</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">
FF202629010171930009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.751" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.290" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="11.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" 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="2.329" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="350.863" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="266.756" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.458" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="118.115" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.328" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="63.844" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="137.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="131">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 300.000 301.000 302.000 303.000 304.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 320.000 317.500 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 331.216 332.432 333.649 334.865 336.081 337.297 338.514 339.730 340.946 342.162 343.378 344.595 345.811 347.027 348.243 349.459 350.676 351.892 353.108 354.324 355.541 356.757 357.973 359.189 360.405 361.622 362.838 364.054 365.270 366.486 367.703 368.919 370.135 371.351 372.568 373.784 375.000 376.216 377.432 378.649 379.865 381.081 382.297 383.514 384.730 385.946 387.162 388.378 389.595 390.811 392.027 393.243 394.459 395.676 396.892 398.108 399.324 400.541 401.757 402.973 404.189 405.405 406.622 407.838 409.054 410.270 411.486 412.703 413.919 415.135 416.351 417.568 418.784 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 445.000 450.000 450.000 455.000 460.000 466.667 473.333 480.000 490.000 500.000 515.000 530.000 550.000 580.302 624.996
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 72 0 0 0 0 75 75 0 69 63 51 72 0 69 54 0 78 0 72 75 0 75 78 75 0 0 72 0 75 72 78 78 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 0 0 0 0 0 0 0 0 0 0 0 0 0 57 63 54 63 63 69 69 66 60 57 63 66 63 0 0 60 60 60 0 60 63 54 54
</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 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -1.171875 -1.953125 -0.390625 2.734375 -2.734375 2.734375 2.734375 -1.953125 -1.953125 -1.953125 1.171875 -1.171875 -2.734375 -1.171875 0.390625 -2.734375 -1.953125 -2.734375 1.171875 0.390625 1.953125 1.171875 -1.953125 -2.734375 1.953125 -2.734375 2.734375 1.171875 -1.171875 -1.953125 2.734375 2.734375 -2.734375 -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 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 -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" >
89.677 90.0 95.0 100.0 105.0 110.0 115.0 116.451 120.0 122.903 125.0 129.354 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 350.863 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.227 1.563 2.017 2.254 2.329 2.253 2.202 2.202 2.202 2.243 2.329 2.352 2.538 2.736 2.941 3.149 3.357 3.565 3.772 3.978 4.185 4.392 4.6 4.81 5.022 5.237 5.455 5.676 5.902 6.132 6.367 6.607 6.853 7.105 7.363 7.627 7.897 8.174 8.456 8.743 9.034 9.328 9.622 9.915 10.204 10.485 10.754 11.008 11.243 11.455 11.641 11.798 11.924 12.017 12.076 12.099 12.1 12.095 12.077 12.045 12.001 11.945 11.878 11.801 11.714 11.618 11.515 11.403 11.285 11.161 11.031 10.895 10.756 10.612 10.464 10.314 10.161 10.005 9.848 9.689 9.529 9.368 9.206 9.044 8.883 8.721 8.56 8.399 8.24 8.081 7.924 7.767 7.613 7.459 7.308 7.158 7.01 6.864 6.719 6.577 6.437 6.299 6.163 6.029 5.898 5.768 5.641 5.516 5.394 5.273 5.155 5.039 4.925 4.814 4.704 4.597 4.492 4.389 4.288 4.189 4.092 3.998 3.905 3.814 3.725 3.638 3.553 3.47 3.389 3.309 3.231 3.155 3.081 3.008 2.937 2.868 2.8 2.733 2.668 2.605 2.543 2.483 2.423 2.366 2.309 2.254 2.2 2.148 2.096 2.046 1.997 1.95 1.903 1.857 1.813 1.769 1.727 1.685 1.645 1.605 1.567 1.529 1.492 1.457 1.422 1.387 1.354 1.321 1.29 1.258 1.228 1.199 1.17 1.142 1.114 1.087 1.061 1.035 1.01 0.986 0.962 0.939 0.916 0.894 0.873 0.852 0.831

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.329" PeakHeight="110.0" Num="3" Error="0.0">
-29.516 11.732 -2.539
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.329" EndFrequency="12.1" PeakHeight="350.863" Num="5" zHalfNm="266.756" Error="2.564">
-201.325 -29.249 8.118 2.521 -1.574
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.354" Depth="0.127"/>
<TopsideChapman PeakHeight="350.863" PeakDensity="1816501.2" PeakScaleHeight="63.844" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
