<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 13:20:00.000"
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" >
2026.10.17 (290) 13:20:00</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">
FF202629010171320009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.625" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.532" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.650" 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="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="10.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.329" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.332" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="351.125" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="252.256" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.208" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="127.733" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.755" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.038" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="175.080" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.140" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="104">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 325.000 320.000 322.500 325.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 346.667 348.333 350.000 350.000 351.986 353.973 355.959 357.945 359.932 361.918 363.904 365.890 367.877 369.863 371.849 373.836 375.822 377.808 379.795 381.781 383.767 385.753 387.740 389.726 391.712 393.699 395.685 397.671 399.658 401.644 403.630 405.616 407.603 409.589 411.575 413.562 415.548 417.534 419.521 421.507 423.493 425.479 427.466 429.452 431.438 433.425 435.411 437.397 439.384 441.370 443.356 445.342 447.329 449.315 451.301 453.288 455.274 457.260 459.247 461.233 463.219 465.205 467.192 469.178 471.164 473.151 475.137 477.123 479.110 481.096 483.082 485.068 487.055 489.041 491.027 493.014 495.000 505.000 515.000 524.432 536.966 554.432 580.456 623.365
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 54 0 60 0 0 57 0 0 0 63 0 0 60 60 0 66 63 60 0 0 0 63 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 51 51 48 51 54 45 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 -1.171875 -1.953125 -0.390625 1.953125 0.390625 -1.171875 0.390625 0.390625 2.734375 -1.953125 1.953125 -1.171875 2.734375 2.734375 1.171875 -2.734375 2.734375 0.390625 -1.953125 -2.734375 0.390625 1.953125 -1.171875 -2.734375 -1.953125 1.953125 1.953125 -0.390625 -1.953125 -2.734375 0.390625 -1.953125 -1.953125 -1.953125 -1.171875 0.390625 -1.171875 -1.953125 -0.390625 -2.734375 1.953125 0.390625 1.953125 -0.390625 -1.953125 1.171875 -1.953125 -0.390625 1.171875 0.390625 0.390625 -1.171875 2.734375 2.734375 0.390625 1.171875 -0.390625 1.171875 -2.734375 2.734375 0.390625 -1.171875 -0.390625 -2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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" >
89.492 90.0 95.0 100.0 105.0 110.0 111.802 113.605 115.0 115.407 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 351.125 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.24 2.881 3.221 3.329 3.206 3.206 3.301 3.329 3.518 3.712 3.897 4.076 4.249 4.419 4.585 4.749 4.911 5.072 5.232 5.392 5.551 5.711 5.87 6.03 6.191 6.353 6.516 6.68 6.845 7.012 7.181 7.351 7.524 7.698 7.875 8.053 8.235 8.418 8.604 8.793 8.984 9.177 9.372 9.568 9.766 9.963 10.16 10.353 10.54 10.718 10.882 11.024 11.138 11.215 11.249 11.25 11.247 11.234 11.211 11.179 11.138 11.089 11.031 10.967 10.895 10.817 10.733 10.644 10.549 10.449 10.345 10.237 10.125 10.01 9.892 9.771 9.648 9.522 9.395 9.267 9.137 9.006 8.874 8.741 8.608 8.475 8.342 8.209 8.076 7.943 7.811 7.679 7.548 7.418 7.289 7.161 7.034 6.908 6.783 6.659 6.537 6.416 6.297 6.179 6.063 5.948 5.835 5.723 5.613 5.504 5.397 5.292 5.188 5.086 4.985 4.886 4.789 4.694 4.6 4.507 4.416 4.327 4.239 4.153 4.069 3.986 3.904 3.824 3.746 3.669 3.593 3.519 3.446 3.375 3.305 3.236 3.169 3.103 3.038 2.975 2.912 2.851 2.792 2.733 2.676 2.619 2.564 2.51 2.458 2.406 2.355 2.305 2.256 2.209 2.162 2.116 2.071 2.028 1.985 1.942 1.901 1.861 1.821 1.783 1.745 1.708 1.671 1.636 1.601 1.567 1.533 1.501 1.469 1.437 1.407 1.377 1.347 1.319 1.29 1.263 1.236 1.209 1.184 1.158 1.134 1.109

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.329" PeakHeight="110.0" Num="3" Error="0.0">
-30.457 13.086 -3.137
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.329" EndFrequency="11.25" PeakHeight="351.125" Num="5" zHalfNm="252.256" Error="2.056">
-197.205 -57.067 19.393 -0.577 -0.262
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.407" Depth="0.123"/>
<TopsideChapman PeakHeight="351.125" PeakDensity="1570254.4" PeakScaleHeight="72.038" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
