<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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) 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">
FF202629010172020009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="11.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.629" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.236" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.400" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.660" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="99.962" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="98.392" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.338" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.651" 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="366.148" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="286.001" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.415" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="113.608" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.898" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.644" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="135.190" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="114">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 311.000 312.000 313.000 314.000 315.000 315.000 317.000 319.000 321.000 323.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 336.910 338.820 340.730 342.640 344.551 346.461 348.371 350.281 352.191 354.101 356.011 357.921 359.831 361.742 363.652 365.562 367.472 369.382 371.292 373.202 375.112 377.022 378.933 380.843 382.753 384.663 386.573 388.483 390.393 392.303 394.213 396.124 398.034 399.944 401.854 403.764 405.674 407.584 409.494 411.404 413.315 415.225 417.135 419.045 420.955 422.865 424.775 426.685 428.596 430.506 432.416 434.326 436.236 438.146 440.056 441.966 443.876 445.787 447.697 449.607 451.517 453.427 455.337 457.247 459.157 461.067 462.978 464.888 466.798 468.708 470.618 472.528 474.438 476.348 478.258 480.169 482.079 483.989 485.899 487.809 489.719 491.629 493.539 495.449 497.360 499.270 501.180 503.090 505.000 510.000 521.134 536.601 559.540
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 81 84 0 0 0 0 81 84 69 0 75 0 75 72 69 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 0 0 0 0 0 0 0 0 0 0 0 0 0 51 51 0 51 48
</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 1.953125 0.390625 0.390625 1.953125 2.734375 -1.171875 2.734375 -0.390625 -0.390625 -0.390625 -2.734375 2.734375 -0.390625 -0.390625 -1.953125 -0.390625 0.390625 2.734375 2.734375 -0.390625 -1.171875 -2.734375 1.171875 -0.390625 -1.171875 -1.953125 1.953125 -1.953125 0.390625 -1.953125 -1.171875 -1.171875 -0.390625 0.390625 0.390625 -0.390625 -1.953125 1.171875 0.390625 1.953125 1.171875 -1.953125 1.171875 -1.171875 -2.734375 0.390625 2.734375 -1.953125 1.953125 -1.953125 2.734375 -2.734375 1.171875 1.171875 -2.734375 0.390625 -0.390625 -2.734375 0.390625 2.734375 1.171875 -0.390625 1.953125 2.734375 -1.171875 2.734375 -1.953125 -2.734375 -1.171875 1.953125 -0.390625 -1.953125 -1.171875 2.734375 0.390625 -0.390625 -1.171875 -2.734375 -2.734375 -0.390625 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="6">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.4 1.45 1.5 1.55 1.6 1.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
99.962 101.540 103.314 105.341 107.700 110.528
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 0 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 -0.390625 -1.171875 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" >
90.0 95.0 98.392 100.0 105.0 108.651 110.0 115.0 118.911 120.0 125.0 129.17 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 366.148 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.516 1.66 1.657 1.602 1.518 1.518 1.518 1.518 1.533 1.602 1.66 1.687 1.848 2.011 2.179 2.354 2.534 2.721 2.915 3.113 3.316 3.523 3.732 3.944 4.157 4.372 4.587 4.803 5.019 5.235 5.451 5.667 5.884 6.101 6.318 6.536 6.754 6.974 7.194 7.415 7.637 7.861 8.086 8.313 8.542 8.773 9.006 9.241 9.479 9.718 9.958 10.199 10.44 10.677 10.905 11.118 11.301 11.435 11.498 11.5 11.495 11.474 11.438 11.388 11.325 11.249 11.161 11.063 10.955 10.839 10.714 10.582 10.444 10.299 10.15 9.996 9.839 9.678 9.515 9.349 9.181 9.013 8.843 8.673 8.503 8.332 8.163 7.994 7.826 7.659 7.493 7.329 7.167 7.006 6.848 6.692 6.537 6.385 6.236 6.089 5.944 5.802 5.662 5.525 5.391 5.259 5.129 5.003 4.878 4.757 4.638 4.522 4.408 4.296 4.187 4.081 3.977 3.875 3.776 3.679 3.584 3.492 3.402 3.314 3.228 3.144 3.062 2.982 2.904 2.829 2.755 2.682 2.612 2.544 2.477 2.412 2.348 2.286 2.226 2.167 2.11 2.054 2.0 1.947 1.896 1.845 1.796 1.749 1.702 1.657 1.613 1.57 1.529 1.488 1.449 1.41 1.373 1.336 1.3 1.266 1.232 1.199 1.167 1.136 1.106 1.076 1.048 1.02 0.993 0.966 0.94 0.915 0.891 0.867 0.844 0.821 0.8 0.778 0.757 0.737 0.718 0.698 0.68 0.662 0.644 0.627 0.61

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.66" PeakHeight="98.392" Num="3" Error="1.923">
-11.871 4.307 -0.828
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.66" EndFrequency="11.5" PeakHeight="366.148" Num="5" zHalfNm="286.001" Error="2.667">
-206.843 -52.224 30.251 -10.198 2.036
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="30.778" Depth="0.142"/>
<TopsideChapman PeakHeight="366.148" PeakDensity="1640818.9" PeakScaleHeight="57.644" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
