<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 20:00:00.000"
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="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="1 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) 20:00:00</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">
FF202628910162000009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="11.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.683" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.392" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.500" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.560" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.050" 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="24" Val="88.243" Name="h`E" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.978" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="371.063" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="280.011" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.465" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="129.959" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.495" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.041" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="137.940" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.750" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 306.429 307.857 309.286 310.714 312.143 313.571 315.000 315.000 316.667 318.333 320.000 320.000 320.000 320.000 320.000 321.667 323.333 325.000 325.000 325.000 325.000 327.500 330.000 330.000 330.000 330.000 331.711 333.421 335.132 336.842 338.553 340.263 341.974 343.684 345.395 347.105 348.816 350.526 352.237 353.947 355.658 357.368 359.079 360.789 362.500 364.211 365.921 367.632 369.342 371.053 372.763 374.474 376.184 377.895 379.605 381.316 383.026 384.737 386.447 388.158 389.868 391.579 393.289 395.000 396.711 398.421 400.132 401.842 403.553 405.263 406.974 408.684 410.395 412.105 413.816 415.526 417.237 418.947 420.658 422.368 424.079 425.789 427.500 429.211 430.921 432.632 434.342 436.053 437.763 439.474 441.184 442.895 444.605 446.316 448.026 449.737 451.447 453.158 454.868 456.579 458.289 460.000 455.000 460.000 470.000 475.000 485.000 485.000 495.000 500.000 509.388 520.644 534.388 551.546 573.573 602.881 643.797
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
78 0 0 0 0 0 0 75 75 0 0 66 69 0 75 78 0 0 78 0 0 75 0 75 75 0 75 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 45 51 51 54 57 45 57 57 54 57 57 57 54 54 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 -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 1.953125 0.390625 0.390625 -1.953125 -0.390625 -1.171875 -2.734375 1.171875 -2.734375 0.390625 2.734375 -1.171875 1.171875 -1.953125 -2.734375 -1.171875 0.390625 -2.734375 1.171875 -1.953125 1.171875 -2.734375 2.734375 1.953125 -2.734375 2.734375 -1.171875 -2.734375 2.734375 1.171875 0.390625 -2.734375 0.390625 -2.734375 2.734375 -2.734375 -0.390625 -1.953125 -1.171875 1.171875 -2.734375 2.734375 1.171875 1.171875 -1.953125 0.390625 -0.390625 -2.734375 -0.390625 -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 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.5 1.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
88.243 90.009
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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" >
89.911 90.0 95.0 100.0 105.0 110.0 115.0 118.335 120.0 125.0 126.67 130.0 135.0 135.005 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 371.063 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.208 1.043 1.351 1.51 1.56 1.523 1.455 1.455 1.455 1.455 1.497 1.56 1.56 1.699 1.848 2.007 2.176 2.354 2.541 2.735 2.937 3.146 3.361 3.583 3.81 4.043 4.281 4.523 4.771 5.022 5.278 5.538 5.801 6.067 6.336 6.609 6.883 7.159 7.437 7.715 7.994 8.273 8.55 8.825 9.097 9.364 9.627 9.882 10.128 10.364 10.588 10.797 10.99 11.163 11.316 11.446 11.551 11.629 11.678 11.699 11.7 11.696 11.681 11.654 11.617 11.569 11.512 11.446 11.371 11.289 11.199 11.103 11.0 10.892 10.778 10.66 10.537 10.41 10.28 10.147 10.011 9.873 9.732 9.59 9.447 9.302 9.156 9.01 8.863 8.717 8.57 8.423 8.277 8.131 7.987 7.842 7.699 7.557 7.416 7.277 7.138 7.002 6.866 6.733 6.6 6.47 6.341 6.214 6.089 5.966 5.844 5.725 5.607 5.491 5.377 5.265 5.155 5.046 4.94 4.836 4.733 4.632 4.533 4.436 4.341 4.247 4.156 4.066 3.978 3.891 3.806 3.723 3.642 3.562 3.484 3.408 3.333 3.259 3.187 3.117 3.048 2.981 2.915 2.85 2.787 2.725 2.664 2.605 2.547 2.49 2.434 2.38 2.327 2.274 2.224 2.174 2.125 2.077 2.031 1.985 1.941 1.897 1.854 1.813 1.772 1.732 1.693 1.655 1.617 1.581 1.545 1.51 1.476 1.443 1.41 1.379 1.347 1.317 1.287 1.258 1.23 1.202 1.175 1.148 1.122 1.097 1.072

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.56" PeakHeight="110.0" Num="3" Error="0.0">
-28.258 10.058 -1.889
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.56" EndFrequency="11.7" PeakHeight="371.063" Num="5" zHalfNm="280.011" Error="1.136">
-226.743 -15.704 8.459 -2.174 0.104
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="25.005" Depth="0.105"/>
<TopsideChapman PeakHeight="371.063" PeakDensity="1698387.1" PeakScaleHeight="68.041" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
