<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 20:40:00.000"
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) 20:40:00</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">
FF202630410312040009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.563" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.889" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="11.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" 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="1.222" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="377.592" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="299.913" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.318" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="112.117" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.864" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.833" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="121.290" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="68">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 385.000 387.500 390.000 390.000 395.000 395.000 397.500 400.000 405.000 405.000 410.000 410.000 415.000 415.000 417.500 420.000 425.000 427.500 430.000 432.500 435.000 437.500 440.000 442.500 445.000 447.500 450.000 452.500 455.000 460.000 462.500 465.000 465.000 468.000 471.000 474.000 477.000 480.000 482.500 485.000 485.000 490.000 490.000 492.500 495.000 495.000 500.000 500.000 500.000 500.000 500.000 505.000 505.000 505.000 510.000 512.500 515.000 515.000 515.000 517.500 520.000 525.000 527.500 530.000 535.000 540.000 547.143
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 51 0 48 57 48 48 0 54 51 57 51 57 51 60 0 57 51 0 0 0 51 0 0 0 0 0 0 0 54 60 0 54 51 0 0 51 0 54 45 54 57 54 0 0 51 57 48 0 57 63 60 57 0 60 0 0 57 54 48 0 54 51 0 57 57 54 48
</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 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 -0.390625 -2.734375 -0.390625 0.390625 -0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -1.171875 -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 -1.171875 -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="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.086 95.0 100.0 105.0 110.0 115.0 120.0 123.656 125.0 130.0 135.0 137.311 140.0 145.0 150.0 150.967 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 377.592 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.815 1.059 1.183 1.222 1.201 1.135 1.056 1.056 1.056 1.056 1.056 1.089 1.149 1.21 1.222 1.356 1.5 1.64 1.782 1.932 2.093 2.267 2.457 2.665 2.891 3.137 3.4 3.677 3.965 4.26 4.558 4.857 5.155 5.451 5.743 6.032 6.319 6.602 6.882 7.16 7.436 7.71 7.983 8.254 8.525 8.796 9.065 9.335 9.604 9.873 10.141 10.407 10.671 10.929 11.181 11.419 11.637 11.824 11.963 12.04 12.05 12.048 12.03 11.995 11.943 11.877 11.796 11.703 11.597 11.481 11.355 11.219 11.076 10.926 10.769 10.607 10.44 10.268 10.094 9.916 9.736 9.554 9.371 9.188 9.003 8.819 8.635 8.452 8.27 8.089 7.909 7.731 7.555 7.381 7.209 7.039 6.872 6.708 6.545 6.386 6.23 6.076 5.925 5.777 5.631 5.489 5.35 5.213 5.08 4.949 4.821 4.696 4.574 4.454 4.338 4.224 4.112 4.004 3.898 3.794 3.693 3.595 3.499 3.405 3.314 3.225 3.138 3.054 2.972 2.891 2.813 2.737 2.663 2.591 2.521 2.452 2.385 2.321 2.257 2.196 2.136 2.078 2.021 1.966 1.912 1.86 1.809 1.759 1.711 1.664 1.619 1.574 1.531 1.489 1.448 1.408 1.37 1.332 1.295 1.26 1.225 1.192 1.159 1.127 1.096 1.066 1.036 1.008 0.98 0.953 0.927 0.901 0.877 0.852 0.829 0.806 0.784 0.762 0.741 0.721 0.701 0.682 0.663 0.645 0.627 0.61

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.222" PeakHeight="110.0" Num="3" Error="0.0">
-27.355 8.954 -1.513
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.222" EndFrequency="12.05" PeakHeight="377.592" Num="5" zHalfNm="299.913" Error="5.21">
-207.882 -33.724 23.073 -13.071 4.979
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="40.967" Depth="0.166"/>
<TopsideChapman PeakHeight="377.592" PeakDensity="1801519.9" PeakScaleHeight="55.833" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
