<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 19:00:00.000"
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) 19:00:00</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">
FF202628910161900009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.582" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.433" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.600" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.710" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="89.416" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" 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="2.591" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="379.253" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="284.856" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.385" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="133.663" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.479" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.262" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="109">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 337.500 340.000 340.000 340.000 342.012 344.024 346.037 348.049 350.061 352.073 354.085 356.098 358.110 360.122 362.134 364.146 366.159 368.171 370.183 372.195 374.207 376.220 378.232 380.244 382.256 384.268 386.280 388.293 390.305 392.317 394.329 396.341 398.354 400.366 402.378 404.390 406.402 408.415 410.427 412.439 414.451 416.463 418.476 420.488 422.500 424.512 426.524 428.537 430.549 432.561 434.573 436.585 438.598 440.610 442.622 444.634 446.646 448.659 450.671 452.683 454.695 456.707 458.720 460.732 462.744 464.756 466.768 468.780 470.793 472.805 474.817 476.829 478.841 480.854 482.866 484.878 486.890 488.902 490.915 492.927 494.939 496.951 498.963 500.976 502.988 505.000 515.000 525.000 535.000 545.000 560.000 580.000 605.000 630.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 51 0 0 60 66 0 66 0 69 66 66 0 72 69 0 72 72 72 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 0 0 0 0 0 0 54 54 54 54 54 54 54 51 45
</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 1.171875 1.171875 0.390625 -0.390625 1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -2.734375 1.953125 -1.171875 -1.171875 -2.734375 1.953125 0.390625 -1.953125 -0.390625 -1.953125 0.390625 1.953125 1.953125 1.171875 0.390625 1.171875 1.171875 2.734375 -2.734375 1.953125 -2.734375 -1.953125 -0.390625 -1.953125 1.953125 -1.953125 2.734375 -1.953125 -1.171875 -2.734375 1.171875 2.734375 -0.390625 -1.171875 -0.390625 -1.953125 1.953125 -1.171875 2.734375 1.171875 -1.171875 -2.734375 0.390625 1.171875 -2.734375 -2.734375 1.953125 2.734375 -1.171875 2.734375 0.390625 1.171875 -0.390625 -0.390625 1.171875 -2.734375 2.734375 2.734375 0.390625 -1.953125 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.6 1.65 1.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
89.416 89.754 90.113
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 63
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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" >
89.852 90.0 95.0 100.0 105.0 110.0 115.0 115.13 120.0 120.259 125.0 125.389 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.253 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.213 1.144 1.481 1.655 1.71 1.632 1.628 1.628 1.628 1.704 1.71 1.837 1.982 2.133 2.292 2.458 2.63 2.808 2.992 3.181 3.374 3.571 3.771 3.973 4.178 4.385 4.594 4.804 5.015 5.227 5.441 5.655 5.87 6.086 6.303 6.521 6.74 6.959 7.179 7.4 7.622 7.844 8.067 8.291 8.515 8.739 8.962 9.185 9.407 9.627 9.844 10.058 10.265 10.466 10.657 10.835 10.996 11.136 11.251 11.336 11.386 11.4 11.4 11.392 11.374 11.345 11.306 11.258 11.201 11.136 11.063 10.983 10.896 10.802 10.703 10.599 10.489 10.375 10.258 10.136 10.011 9.884 9.753 9.621 9.487 9.351 9.213 9.075 8.936 8.796 8.655 8.515 8.374 8.234 8.094 7.954 7.816 7.677 7.54 7.404 7.269 7.135 7.002 6.87 6.74 6.612 6.485 6.359 6.235 6.113 5.992 5.873 5.756 5.641 5.527 5.415 5.305 5.196 5.09 4.985 4.882 4.781 4.681 4.583 4.487 4.393 4.301 4.21 4.121 4.033 3.948 3.863 3.781 3.7 3.621 3.543 3.467 3.392 3.319 3.247 3.177 3.108 3.041 2.975 2.91 2.846 2.784 2.724 2.664 2.606 2.549 2.493 2.438 2.385 2.333 2.281 2.231 2.182 2.134 2.087 2.041 1.996 1.952 1.909 1.867 1.826 1.785 1.746 1.707 1.669 1.632 1.596 1.561 1.526 1.492 1.459 1.427 1.395 1.364 1.334 1.305 1.276 1.247 1.22 1.192 1.166 1.14

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.71" PeakHeight="110.0" Num="3" Error="0.0">
-28.571 10.458 -2.035
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.71" EndFrequency="11.4" PeakHeight="379.253" Num="5" zHalfNm="284.856" Error="1.578">
-232.903 -35.99 20.612 -6.614 1.031
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.389" Depth="0.082"/>
<TopsideChapman PeakHeight="379.253" PeakDensity="1612407.0" PeakScaleHeight="69.262" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
