<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 20:30:00.000"
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="14.0">
<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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.24 (297) 20:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629710242030009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.652" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.316" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="466.250" 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="1.439" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="358.120" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="280.836" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.373" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="109.683" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.271" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.151" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="123.030" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.470" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="111">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 291.111 292.222 293.333 294.444 295.556 296.667 297.778 298.889 300.000 301.111 302.222 303.333 304.444 305.556 306.667 307.778 308.889 310.000 310.000 315.000 315.000 315.000 317.000 319.000 321.000 323.000 325.000 325.000 326.818 328.636 330.455 332.273 334.091 335.909 337.727 339.545 341.364 343.182 345.000 345.000 350.000 350.000 355.000 355.000 356.852 358.704 360.556 362.407 364.259 366.111 367.963 369.815 371.667 373.519 375.370 377.222 379.074 380.926 382.778 384.630 386.481 388.333 390.185 392.037 393.889 395.741 397.593 399.444 401.296 403.148 405.000 405.000 406.875 408.750 410.625 412.500 414.375 416.250 418.125 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 452.500 455.000 455.000 458.750 462.500 466.250 470.000 480.000 482.500 485.000 490.000 495.000 500.000 505.000 511.851 519.742 528.928 539.759
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 66 0 0 0 0 0 0 0 48 66 63 66 63 60 51 60 57 60 57 60 57 0 54 54 0 0 0 57 54 0 60 63 60 63 63 60 57 0 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 -2.734375 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 0.390625 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 2.734375 -1.953125 -1.953125 2.734375 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125
</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" >
89.964 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.723 125.0 130.0 133.446 135.0 140.0 145.0 145.169 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 358.12 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.203 0.962 1.247 1.393 1.439 1.413 1.331 1.289 1.289 1.289 1.289 1.309 1.373 1.437 1.439 1.602 1.761 1.919 2.082 2.251 2.429 2.615 2.81 3.013 3.225 3.444 3.669 3.899 4.132 4.368 4.606 4.845 5.085 5.325 5.565 5.805 6.045 6.285 6.525 6.764 7.004 7.243 7.483 7.722 7.961 8.199 8.437 8.673 8.907 9.137 9.361 9.575 9.777 9.958 10.111 10.224 10.289 10.3 10.299 10.285 10.257 10.215 10.16 10.093 10.015 9.927 9.829 9.723 9.61 9.489 9.362 9.23 9.093 8.951 8.806 8.658 8.508 8.355 8.201 8.046 7.89 7.733 7.577 7.42 7.264 7.109 6.955 6.802 6.65 6.5 6.352 6.205 6.06 5.918 5.777 5.639 5.502 5.369 5.237 5.108 4.981 4.857 4.735 4.616 4.499 4.384 4.272 4.163 4.055 3.951 3.848 3.748 3.65 3.555 3.461 3.37 3.282 3.195 3.11 3.028 2.947 2.869 2.792 2.718 2.645 2.574 2.505 2.438 2.372 2.308 2.246 2.186 2.127 2.069 2.013 1.959 1.906 1.854 1.804 1.755 1.707 1.661 1.616 1.572 1.529 1.487 1.447 1.407 1.369 1.332 1.295 1.26 1.226 1.192 1.159 1.128 1.097 1.067 1.038 1.009 0.982 0.955 0.929 0.903 0.879 0.855 0.831 0.809 0.786 0.765 0.744 0.724 0.704 0.684 0.666 0.647 0.63 0.612 0.596 0.579 0.563 0.548 0.533 0.518 0.504 0.49 0.477

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.439" PeakHeight="110.0" Num="3" Error="0.0">
-27.977 9.703 -1.762
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.439" EndFrequency="10.3" PeakHeight="358.12" Num="5" zHalfNm="280.836" Error="3.3">
-193.88 -33.307 19.456 -7.59 2.37
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="35.169" Depth="0.15"/>
<TopsideChapman PeakHeight="358.12" PeakDensity="1316253.1" PeakScaleHeight="56.151" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
