<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 16:50:00.000"
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) 16:50:00</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">
FF202630410311650009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.781" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.376" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.205" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.274" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="326.360" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="223.371" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.729" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="140.334" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.963" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.169" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="155.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.760" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="58">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
365.000 365.000 367.500 370.000 372.500 375.000 375.000 375.000 375.000 375.000 375.000 376.250 377.500 378.750 380.000 380.000 380.000 382.500 385.000 385.000 385.000 385.000 387.000 389.000 391.000 393.000 395.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 430.000 430.000 430.000 435.000 440.000 450.000 455.000 460.000 467.914 477.226 488.343 501.845 518.594 539.919 567.992 606.620 663.134
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 0 0 0 0 0 0 66 0 0 0 0 0 66 69 66 0 66 0 66 63 0 0 0 0 66 63 63 60 57 60 57 60 60 63 60 60 54 57 57 54 60 60 57 57 57 57 54 54 57 57 57 54 48 45 0 0
</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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 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" >
89.512 90.0 95.0 100.0 105.0 110.0 112.322 114.643 115.0 116.965 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 326.36 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.155 2.774 3.101 3.205 3.083 3.083 3.102 3.205 3.325 3.531 3.747 3.971 4.203 4.442 4.688 4.938 5.192 5.45 5.709 5.971 6.233 6.496 6.758 7.021 7.282 7.543 7.802 8.059 8.314 8.567 8.818 9.065 9.309 9.549 9.784 10.014 10.237 10.454 10.663 10.862 11.051 11.228 11.39 11.538 11.668 11.779 11.869 11.936 11.98 11.999 12.0 11.997 11.985 11.964 11.933 11.895 11.848 11.793 11.731 11.662 11.587 11.506 11.419 11.327 11.23 11.129 11.023 10.914 10.801 10.685 10.566 10.445 10.321 10.195 10.067 9.938 9.807 9.676 9.543 9.41 9.276 9.142 9.007 8.873 8.738 8.604 8.47 8.337 8.204 8.072 7.94 7.81 7.68 7.552 7.424 7.298 7.173 7.049 6.926 6.805 6.685 6.566 6.449 6.333 6.219 6.106 5.995 5.885 5.777 5.67 5.565 5.462 5.36 5.259 5.16 5.063 4.967 4.873 4.78 4.689 4.599 4.511 4.424 4.339 4.255 4.173 4.092 4.013 3.935 3.858 3.783 3.709 3.636 3.565 3.495 3.426 3.358 3.292 3.227 3.163 3.101 3.039 2.979 2.92 2.862 2.805 2.749 2.695 2.641 2.588 2.536 2.486 2.436 2.387 2.34 2.293 2.247 2.202 2.158 2.114 2.072 2.03 1.989 1.949 1.91 1.872 1.834 1.797 1.761 1.726 1.691 1.657 1.623 1.591 1.558 1.527 1.496 1.466 1.436 1.407 1.379 1.351 1.324 1.297 1.271 1.245

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.205" PeakHeight="110.0" Num="3" Error="0.0">
-30.361 12.946 -3.073
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.205" EndFrequency="12.0" PeakHeight="326.36" Num="5" zHalfNm="223.371" Error="2.584">
-201.034 -13.357 7.065 -2.341 0.272
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.965" Depth="0.122"/>
<TopsideChapman PeakHeight="326.36" PeakDensity="1786600.5" PeakScaleHeight="76.169" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
