<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 20:10:00.000"
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) 20:10:00</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">
FF202628910162010009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.638" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.991" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="11.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.827" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="375.762" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="279.168" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.446" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="136.916" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.000" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.315" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="145.670" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.780" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 306.667 308.333 310.000 311.667 313.333 315.000 316.667 318.333 320.000 320.000 320.000 321.667 323.333 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 326.807 328.614 330.422 332.229 334.036 335.843 337.651 339.458 341.265 343.072 344.880 346.687 348.494 350.301 352.108 353.916 355.723 357.530 359.337 361.145 362.952 364.759 366.566 368.373 370.181 371.988 373.795 375.602 377.410 379.217 381.024 382.831 384.639 386.446 388.253 390.060 391.867 393.675 395.482 397.289 399.096 400.904 402.711 404.518 406.325 408.133 409.940 411.747 413.554 415.361 417.169 418.976 420.783 422.590 424.398 426.205 428.012 429.819 431.627 433.434 435.241 437.048 438.855 440.663 442.470 444.277 446.084 447.892 449.699 451.506 453.313 455.120 456.928 458.735 460.542 462.349 464.157 465.964 467.771 469.578 471.386 473.193 475.000 479.478 484.598 490.509 497.411 505.575 515.383 527.385 542.411 561.770 587.649 624.013 678.848
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 78 0 0 0 60 0 72 54 0 66 0 75 0 0 69 0 75 0 75 72 0 75 0 75 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 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 60 60 60 57 57 54 57 54 54 51 0 51 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 1.953125 2.734375 -0.390625 -0.390625 0.390625 1.171875 2.734375 -1.171875 -1.171875 -1.171875 1.953125 2.734375 -0.390625 -0.390625 2.734375 -0.390625 1.953125 2.734375 -2.734375 2.734375 2.734375 2.734375 0.390625 1.953125 1.953125 -2.734375 1.171875 -1.171875 -0.390625 2.734375 -1.171875 2.734375 -0.390625 1.171875 -2.734375 1.953125 0.390625 1.171875 1.171875 -2.734375 0.390625 1.171875 2.734375 2.734375 -2.734375 -1.171875 -1.171875 2.734375 -2.734375 1.171875 1.953125 2.734375 1.953125 -1.171875 -1.953125 -1.171875 0.390625 2.734375 2.734375 -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 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" >
89.813 90.0 95.0 100.0 105.0 110.0 115.0 119.193 120.0 125.0 128.385 130.0 135.0 137.578 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 375.762 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.216 1.223 1.582 1.768 1.827 1.788 1.691 1.691 1.691 1.691 1.715 1.789 1.827 1.897 2.05 2.213 2.386 2.567 2.755 2.951 3.154 3.362 3.576 3.795 4.019 4.248 4.481 4.718 4.96 5.205 5.454 5.706 5.962 6.22 6.482 6.745 7.011 7.278 7.547 7.816 8.085 8.353 8.62 8.885 9.146 9.403 9.654 9.899 10.135 10.361 10.577 10.779 10.966 11.137 11.291 11.424 11.536 11.626 11.692 11.733 11.75 11.75 11.746 11.732 11.707 11.673 11.63 11.579 11.519 11.451 11.377 11.295 11.208 11.114 11.015 10.911 10.803 10.69 10.574 10.454 10.331 10.206 10.077 9.947 9.815 9.681 9.546 9.41 9.272 9.135 8.996 8.858 8.719 8.58 8.442 8.304 8.166 8.029 7.893 7.758 7.623 7.49 7.357 7.226 7.096 6.968 6.84 6.715 6.59 6.467 6.346 6.226 6.108 5.992 5.877 5.764 5.652 5.542 5.434 5.328 5.223 5.12 5.018 4.918 4.82 4.724 4.629 4.536 4.444 4.355 4.266 4.18 4.095 4.011 3.929 3.848 3.769 3.692 3.616 3.541 3.468 3.396 3.326 3.257 3.189 3.123 3.058 2.994 2.932 2.871 2.811 2.752 2.694 2.638 2.582 2.528 2.475 2.423 2.372 2.322 2.273 2.225 2.178 2.132 2.087 2.043 2.0 1.957 1.916 1.875 1.836 1.797 1.759 1.722 1.685 1.649 1.614 1.58 1.546 1.514 1.481 1.45 1.419 1.389 1.359 1.33 1.302

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.827" PeakHeight="110.0" Num="3" Error="0.0">
-28.782 10.737 -2.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.827" EndFrequency="11.75" PeakHeight="375.762" Num="5" zHalfNm="279.168" Error="1.493">
-229.889 -13.751 6.938 -1.364 -0.118
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.578" Depth="0.136"/>
<TopsideChapman PeakHeight="375.762" PeakDensity="1712934.2" PeakScaleHeight="72.315" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
