<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 20:20:00.000"
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) 20:20:00</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">
FF202628910162020009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.690" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.605" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.654" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="365.911" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="280.560" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.415" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="121.493" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.838" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="63.419" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="131.930" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.640" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="120">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 307.500 310.000 312.500 315.000 315.000 315.000 315.000 315.000 315.000 316.667 318.333 320.000 320.000 321.667 323.333 325.000 325.000 326.250 327.500 328.750 330.000 330.000 331.250 332.500 333.750 335.000 335.000 336.513 338.026 339.539 341.053 342.566 344.079 345.592 347.105 348.618 350.132 351.645 353.158 354.671 356.184 357.697 359.211 360.724 362.237 363.750 365.263 366.776 368.289 369.803 371.316 372.829 374.342 375.855 377.368 378.882 380.395 381.908 383.421 384.934 386.447 387.961 389.474 390.987 392.500 394.013 395.526 397.039 398.553 400.066 401.579 403.092 404.605 406.118 407.632 409.145 410.658 412.171 413.684 415.197 416.711 418.224 419.737 421.250 422.763 424.276 425.789 427.303 428.816 430.329 431.842 433.355 434.868 436.382 437.895 439.408 440.921 442.434 443.947 445.461 446.974 448.487 450.000 455.000 460.000 465.000 475.000 480.000 480.000 490.000 495.000 503.171 513.136 525.560 541.482 562.619 592.037 635.786
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 0 0 0 0 75 78 0 0 75 75 0 0 75 75 0 63 72 72 0 0 0 72 75 0 0 69 72 69 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 51 51 54 54 54 57 57 57 57 60 57 51 48 0 0 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 1.953125 -1.171875 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 2.734375 -0.390625 2.734375 -1.953125 1.953125 2.734375 0.390625 0.390625 -1.171875 -0.390625 2.734375 1.171875 1.171875 1.953125 2.734375 -1.171875 -2.734375 1.171875 -1.953125 1.953125 -1.171875 -1.953125 -1.171875 2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 0.390625 1.953125 1.171875 2.734375 2.734375 -1.953125 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 2.734375 -0.390625 1.953125
</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" >
89.873 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.241 125.0 130.0 130.482 135.0 140.0 140.723 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 365.911 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.211 1.107 1.433 1.601 1.654 1.621 1.52 1.513 1.513 1.513 1.513 1.575 1.644 1.654 1.786 1.948 2.119 2.299 2.487 2.684 2.889 3.101 3.321 3.546 3.777 4.014 4.256 4.503 4.753 5.008 5.266 5.528 5.793 6.061 6.331 6.604 6.88 7.157 7.435 7.715 7.996 8.277 8.558 8.837 9.115 9.39 9.661 9.926 10.184 10.433 10.669 10.891 11.095 11.278 11.435 11.564 11.661 11.724 11.749 11.75 11.745 11.727 11.696 11.653 11.598 11.532 11.456 11.371 11.277 11.176 11.066 10.951 10.829 10.701 10.568 10.431 10.29 10.146 9.998 9.848 9.696 9.542 9.386 9.23 9.072 8.914 8.756 8.598 8.44 8.283 8.126 7.97 7.815 7.661 7.509 7.358 7.209 7.061 6.915 6.77 6.628 6.487 6.349 6.213 6.078 5.946 5.816 5.688 5.562 5.439 5.317 5.198 5.081 4.966 4.854 4.743 4.635 4.529 4.424 4.323 4.223 4.125 4.029 3.935 3.844 3.754 3.666 3.58 3.496 3.413 3.333 3.254 3.177 3.102 3.028 2.956 2.886 2.817 2.75 2.685 2.621 2.558 2.497 2.437 2.379 2.321 2.266 2.211 2.158 2.106 2.056 2.006 1.958 1.911 1.865 1.82 1.776 1.733 1.691 1.65 1.61 1.571 1.533 1.496 1.46 1.425 1.39 1.357 1.324 1.292 1.26 1.23 1.2 1.171 1.143 1.115 1.088 1.061 1.036 1.011 0.986 0.962 0.939 0.916 0.894 0.872 0.851

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.654" PeakHeight="110.0" Num="3" Error="0.0">
-28.462 10.316 -1.981
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.654" EndFrequency="11.75" PeakHeight="365.911" Num="5" zHalfNm="280.56" Error="1.077">
-212.048 -21.911 11.579 -3.258 0.45
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="30.723" Depth="0.141"/>
<TopsideChapman PeakHeight="365.911" PeakDensity="1712934.2" PeakScaleHeight="63.419" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
