<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-17 -017 21:30:00.000"
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="18.0">
<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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.01.17 (017) 21:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.11" 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">
FF202601701172130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.642" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.152" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.000" 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="0.778" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="390.754" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="322.844" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.319" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="99.044" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.449" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.838" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.170" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.840" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="200">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 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 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 281.667 283.333 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 300.000 295.000 297.500 300.000 300.000 300.000 300.000 300.000 300.000 300.000 301.000 302.000 303.000 304.000 305.000 306.000 307.000 308.000 309.000 310.000 310.000 311.000 312.000 313.000 314.000 315.000 316.364 317.727 319.091 320.455 321.818 323.182 324.545 325.909 327.273 328.636 330.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 336.250 337.500 338.750 340.000 340.000 340.000 340.000 340.000 340.833 341.667 342.500 343.333 344.167 345.000 345.833 346.667 347.500 348.333 349.167 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 365.000 370.000 372.500 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 387.500 390.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 397.500 395.000 400.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 407.500 410.000 410.000 415.000 416.429 417.857 419.286 420.714 422.143 423.571 425.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 437.500 440.000 442.500 445.000 445.000 450.000 450.000 455.000 455.000 455.000 460.000 462.500 465.000 467.500 470.000 475.000 480.000 485.000 485.000 490.000 495.000 501.228 508.177 515.982 524.811 534.879 546.467 559.948 575.825
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 0 66 69 66 66 63 63 69 69 66 66 66 66 63 66 60 0 60 69 0 63 66 0 0 0 60 57 0 0 0 0 0 0 0 0 0 51 0 0 0 0 0 66 0 0 57 0 0 0 0 0 0 0 48 66 57 0 0 0 51 0 0 69 69 0 0 0 63 66 69 72 72 0 0 0 0 0 0 0 0 0 0 0 69 69 72 72 72 69 69 0 69 0 72 72 69 0 69 72 72 72 66 66 69 72 75 63 0 66 72 75 0 63 66 69 66 69 72 69 66 69 72 54 72 66 63 69 72 66 72 63 66 69 66 72 66 66 69 66 60 0 66 0 54 57 60 63 0 66 63 0 60 63 57 0 45 0 0 0 0 51 57 57 48 0 45 51 54 0 51 0 48 51 45 51 45 54 54 54 0 54 0 51 51 51 48 48 48 48 51 51 45 0 48 45 42 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.591 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 133.438 135.0 140.0 145.0 150.0 155.0 156.876 160.0 165.0 170.0 175.0 180.0 180.314 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 390.754 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.517 0.674 0.753 0.778 0.766 0.729 0.662 0.557 0.445 0.445 0.445 0.445 0.445 0.445 0.445 0.489 0.56 0.631 0.703 0.774 0.778 0.893 1.016 1.144 1.28 1.425 1.582 1.751 1.935 2.133 2.348 2.579 2.828 3.094 3.377 3.677 3.993 4.325 4.671 5.031 5.402 5.784 6.176 6.576 6.982 7.393 7.808 8.224 8.639 9.052 9.459 9.858 10.245 10.618 10.971 11.301 11.602 11.87 12.1 12.287 12.426 12.514 12.549 12.55 12.542 12.511 12.459 12.388 12.3 12.194 12.074 11.94 11.793 11.636 11.469 11.293 11.11 10.92 10.726 10.526 10.323 10.117 9.909 9.699 9.489 9.278 9.068 8.858 8.649 8.442 8.236 8.033 7.832 7.633 7.437 7.245 7.055 6.869 6.685 6.506 6.33 6.157 5.988 5.823 5.661 5.503 5.349 5.198 5.051 4.907 4.767 4.631 4.497 4.368 4.242 4.119 3.999 3.882 3.769 3.659 3.551 3.447 3.345 3.247 3.151 3.058 2.967 2.879 2.794 2.71 2.63 2.551 2.475 2.401 2.33 2.26 2.192 2.127 2.063 2.001 1.941 1.883 1.826 1.772 1.718 1.667 1.617 1.568 1.521 1.475 1.43 1.387 1.346 1.305 1.266 1.228 1.19 1.155 1.12 1.086 1.053 1.021 0.99 0.961 0.932 0.903 0.876 0.85 0.824 0.799 0.775 0.752 0.729 0.707 0.685 0.665 0.645 0.625 0.606 0.588 0.57 0.553 0.536 0.52 0.504 0.489

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.778" PeakHeight="110.0" Num="3" Error="0.0">
-25.258 6.737 -0.888
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.778" EndFrequency="12.55" PeakHeight="390.754" Num="5" zHalfNm="322.844" Error="2.307">
-201.253 -13.76 5.219 -1.786 1.14
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="70.314" Depth="0.333"/>
<TopsideChapman PeakHeight="390.754" PeakDensity="1954125.2" PeakScaleHeight="50.838" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
