<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 18:20:00.000"
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) 18:20:00</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">
FF202629010171820009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.656" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.679" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.900" 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="10.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" 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="2.852" 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="365.626" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="262.008" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.235" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="143.302" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.491" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="79.286" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="166.070" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.610" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="115">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 320.000 321.667 323.333 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 341.597 343.194 344.792 346.389 347.986 349.583 351.181 352.778 354.375 355.972 357.569 359.167 360.764 362.361 363.958 365.556 367.153 368.750 370.347 371.944 373.542 375.139 376.736 378.333 379.931 381.528 383.125 384.722 386.319 387.917 389.514 391.111 392.708 394.306 395.903 397.500 399.097 400.694 402.292 403.889 405.486 407.083 408.681 410.278 411.875 413.472 415.069 416.667 418.264 419.861 421.458 423.056 424.653 426.250 427.847 429.444 431.042 432.639 434.236 435.833 437.431 439.028 440.625 442.222 443.819 445.417 447.014 448.611 450.208 451.806 453.403 455.000 460.000 465.000 475.000 480.000 490.000 490.000 500.000 510.000 519.388 530.644 544.388 561.546 583.573 612.881 653.797 714.919
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 69 0 0 60 63 66 66 66 69 69 72 72 72 69 66 69 0 60 69 72 66 69 75 0 69 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 54 54 54 60 63 54 60 63 60 60 54 54 54 51 45 42 42
</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 -0.390625 -2.734375 -0.390625 -0.390625 0.390625 1.171875 0.390625 -1.953125 -0.390625 -0.390625 -0.390625 2.734375 0.390625 1.953125 -1.953125 1.171875 0.390625 -2.734375 -1.171875 -1.953125 -1.953125 2.734375 1.171875 2.734375 2.734375 2.734375 0.390625 -2.734375 -2.734375 0.390625 0.390625 -1.171875 1.171875 0.390625 -2.734375 0.390625 -1.953125 1.171875 0.390625 -2.734375 -0.390625 0.390625 2.734375 -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
</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" >
89.571 90.0 95.0 100.0 105.0 110.0 113.891 115.0 117.781 120.0 121.672 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 365.626 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.917 2.469 2.759 2.852 2.73 2.73 2.73 2.8 2.852 2.957 3.127 3.306 3.49 3.676 3.861 4.045 4.227 4.407 4.586 4.764 4.942 5.12 5.298 5.478 5.659 5.842 6.027 6.215 6.405 6.599 6.797 6.999 7.205 7.416 7.631 7.851 8.076 8.304 8.537 8.772 9.01 9.247 9.484 9.717 9.944 10.163 10.371 10.567 10.747 10.911 11.058 11.186 11.295 11.385 11.455 11.506 11.538 11.55 11.55 11.547 11.535 11.514 11.486 11.45 11.407 11.358 11.301 11.239 11.171 11.097 11.018 10.935 10.847 10.755 10.659 10.559 10.457 10.351 10.243 10.132 10.019 9.904 9.787 9.669 9.549 9.428 9.306 9.184 9.06 8.937 8.813 8.688 8.564 8.44 8.315 8.192 8.068 7.945 7.823 7.701 7.58 7.459 7.34 7.221 7.104 6.987 6.872 6.758 6.644 6.532 6.422 6.312 6.204 6.097 5.991 5.887 5.784 5.682 5.582 5.483 5.385 5.289 5.194 5.101 5.009 4.918 4.829 4.741 4.654 4.569 4.485 4.403 4.322 4.242 4.163 4.086 4.01 3.935 3.862 3.79 3.719 3.649 3.58 3.513 3.447 3.382 3.318 3.255 3.193 3.133 3.073 3.015 2.957 2.901 2.846 2.791 2.738 2.686 2.634 2.584 2.535 2.486 2.438 2.391 2.345 2.3 2.256 2.213 2.17 2.128 2.087 2.047 2.008 1.969 1.931 1.893 1.857 1.821 1.786 1.751 1.717 1.684 1.651 1.62 1.588 1.557

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.852" PeakHeight="110.0" Num="3" Error="0.0">
-30.067 12.515 -2.877
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.852" EndFrequency="11.55" PeakHeight="365.626" Num="5" zHalfNm="262.008" Error="3.569">
-225.177 -24.905 3.546 4.965 -2.383
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.672" Depth="0.122"/>
<TopsideChapman PeakHeight="365.626" PeakDensity="1655117.9" PeakScaleHeight="79.286" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
