<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 17:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</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" >
2026.10.31 (304) 17:50:00</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">
FF202630410311750009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.762" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.143" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.985" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.166" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="349.138" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="267.041" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.099" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="114.248" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.090" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="64.358" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="128.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.800" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="156">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 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 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 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 265.000 265.000 268.750 272.500 276.250 280.000 280.000 281.084 282.169 283.253 284.337 285.422 286.506 287.590 288.675 289.759 290.843 291.928 293.012 294.096 295.181 296.265 297.349 298.434 299.518 300.602 301.687 302.771 303.855 304.940 306.024 307.108 308.193 309.277 310.361 311.446 312.530 313.614 314.699 315.783 316.867 317.952 319.036 320.120 321.205 322.289 323.373 324.458 325.542 326.627 327.711 328.795 329.880 330.964 332.048 333.133 334.217 335.301 336.386 337.470 338.554 339.639 340.723 341.807 342.892 343.976 345.060 346.145 347.229 348.313 349.398 350.482 351.566 352.651 353.735 354.819 355.904 356.988 358.072 359.157 360.241 361.325 362.410 363.494 364.578 365.663 366.747 367.831 368.916 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 381.000 382.000 383.000 384.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 435.000 445.000 450.000 450.000 455.000 460.000 470.000 475.000 482.577 491.921 503.732 519.136 540.067 570.147 617.056
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 51 0 54 0 57 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 0 0 0 0 0 0 0 0 0 0 66 66 0 0 0 0 0 0 69 57 0 63 0 66 66 0 0 57 66 60 0 63 63 57 60 0 57 60 57 60 54 60 54 60 57 51 60 57 54 51 57 54 54 57 60 60 57 57 54 54 45 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 2.734375 -0.390625 1.171875 1.171875 -1.171875 0.390625 -0.390625 -1.953125 1.953125 1.953125 -1.171875 0.390625 0.390625 0.390625 2.734375 -0.390625 -1.171875 1.953125 -0.390625 0.390625 1.171875 -1.953125 -1.171875 0.390625 2.734375 0.390625 1.953125 -1.953125 -2.734375 2.734375 -2.734375 -1.953125 -0.390625 1.953125 -1.953125 -2.734375 -1.953125 1.953125 -1.953125 -0.390625 -1.171875 -2.734375 -1.171875 -2.734375 -2.734375 -1.171875 -2.734375 -1.953125 0.390625 1.953125 1.953125 1.953125 1.953125 -1.171875 2.734375 1.171875 -0.390625 -2.734375 0.390625 0.390625 0.390625 0.390625 -0.390625 -1.953125 -1.953125 -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 -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
</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" >
89.549 90.0 95.0 100.0 105.0 110.0 113.285 115.0 116.57 119.855 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 349.138 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 2.007 2.584 2.888 2.985 2.863 2.863 2.863 2.985 2.99 3.139 3.28 3.416 3.55 3.684 3.817 3.951 4.087 4.226 4.366 4.511 4.659 4.811 4.969 5.131 5.3 5.475 5.658 5.848 6.048 6.257 6.476 6.706 6.949 7.204 7.472 7.754 8.049 8.357 8.675 9.001 9.331 9.66 9.982 10.291 10.583 10.853 11.097 11.313 11.5 11.658 11.785 11.883 11.951 11.99 12.0 12.0 11.99 11.968 11.933 11.885 11.827 11.758 11.679 11.591 11.495 11.391 11.28 11.162 11.038 10.909 10.775 10.636 10.494 10.348 10.2 10.048 9.895 9.74 9.583 9.426 9.267 9.108 8.949 8.79 8.631 8.473 8.315 8.158 8.002 7.847 7.693 7.541 7.39 7.241 7.094 6.948 6.805 6.663 6.523 6.385 6.249 6.115 5.984 5.854 5.727 5.602 5.479 5.358 5.239 5.123 5.008 4.896 4.786 4.678 4.572 4.469 4.367 4.268 4.17 4.074 3.981 3.889 3.8 3.712 3.626 3.542 3.46 3.379 3.301 3.224 3.148 3.075 3.003 2.932 2.863 2.796 2.73 2.666 2.603 2.542 2.482 2.423 2.366 2.31 2.256 2.202 2.15 2.099 2.049 2.001 1.953 1.907 1.861 1.817 1.774 1.732 1.69 1.65 1.611 1.572 1.535 1.498 1.463 1.428 1.394 1.36 1.328 1.296 1.265 1.235 1.205 1.177 1.149 1.121 1.094 1.068 1.043 1.018 0.993 0.969 0.946 0.924 0.902 0.88 0.859 0.838

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.985" PeakHeight="110.0" Num="3" Error="0.0">
-30.182 12.684 -2.953
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.985" EndFrequency="12.0" PeakHeight="349.138" Num="5" zHalfNm="267.041" Error="2.35">
-192.091 -36.09 -7.174 5.978 0.094
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.855" Depth="0.122"/>
<TopsideChapman PeakHeight="349.138" PeakDensity="1786600.5" PeakScaleHeight="64.358" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
