<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-30 -303 18:00:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2x cusp not found, 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" >
2026.10.30 (303) 18:00:00</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">
FF202630310301800009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.586" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.988" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="455.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="455.000" 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="9.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" 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="2.939" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.143" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="336.133" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="225.241" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.148" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="146.588" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.427" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="78.940" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="168.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.590" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
455.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 475.000 485.000 490.000 490.000 495.000 499.646 504.836 510.673 517.284 524.836 533.544 543.696 555.684 570.054 587.595
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 51 0 51 57 48 57 54 57 57 51 48 60 60 54 54 57 54 54 54 54 54 51 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
</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" >
89.556 90.0 95.0 100.0 105.0 110.0 113.493 115.0 116.985 120.0 120.478 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 336.133 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.975 2.544 2.844 2.939 2.817 2.817 2.817 2.922 2.939 3.105 3.277 3.447 3.619 3.796 3.98 4.171 4.371 4.579 4.793 5.012 5.234 5.457 5.677 5.895 6.108 6.316 6.519 6.717 6.91 7.098 7.281 7.459 7.634 7.805 7.972 8.136 8.297 8.455 8.61 8.763 8.912 9.057 9.199 9.337 9.469 9.595 9.712 9.817 9.908 9.98 10.028 10.049 10.05 10.048 10.038 10.021 9.997 9.966 9.929 9.886 9.837 9.783 9.723 9.659 9.591 9.518 9.441 9.361 9.277 9.191 9.101 9.009 8.914 8.817 8.718 8.618 8.516 8.412 8.308 8.202 8.096 7.988 7.881 7.772 7.664 7.555 7.447 7.338 7.229 7.121 7.013 6.906 6.799 6.693 6.587 6.482 6.377 6.274 6.171 6.069 5.969 5.869 5.77 5.672 5.576 5.48 5.386 5.292 5.2 5.109 5.019 4.93 4.843 4.757 4.672 4.588 4.505 4.424 4.344 4.265 4.187 4.11 4.035 3.96 3.887 3.816 3.745 3.675 3.607 3.54 3.473 3.408 3.345 3.282 3.22 3.159 3.1 3.041 2.983 2.927 2.871 2.817 2.763 2.71 2.659 2.608 2.558 2.509 2.461 2.414 2.368 2.322 2.277 2.234 2.191 2.149 2.107 2.066 2.027 1.987 1.949 1.911 1.874 1.838 1.803 1.768 1.733 1.7 1.667 1.634 1.603 1.572 1.541 1.511 1.482 1.453 1.425 1.397 1.37 1.343 1.317 1.291 1.266 1.241 1.217 1.194

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.939" PeakHeight="110.0" Num="3" Error="0.0">
-30.143 12.626 -2.927
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.939" EndFrequency="10.05" PeakHeight="336.133" Num="5" zHalfNm="225.241" Error="5.072">
-200.295 -26.298 17.046 -9.019 2.911
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.478" Depth="0.122"/>
<TopsideChapman PeakHeight="336.133" PeakDensity="1253132.8" PeakScaleHeight="78.94" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
