<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 19:30:00.000"
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="12.0">
<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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o 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" >
2026.10.20 (293) 19:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629310201930009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.542" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.822" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="495.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="495.000" 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="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" 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="2.323" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="367.913" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="254.629" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.458" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="157.580" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.576" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="84.551" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="164.850" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.960" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
495.000 500.000 505.000 512.012 519.844 528.648 538.618 550.000 563.119 578.404 596.441 618.046 644.394 677.239
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 57 51 57 51 0 0 0 42 0 0 36 39
</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 1.171875 0.390625 1.171875
</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" >
89.678 90.0 95.0 100.0 105.0 110.0 115.0 116.481 120.0 122.963 125.0 129.444 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 367.913 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.227 1.559 2.011 2.248 2.323 2.248 2.196 2.196 2.196 2.236 2.323 2.34 2.495 2.652 2.814 2.981 3.153 3.331 3.516 3.707 3.904 4.108 4.317 4.531 4.749 4.971 5.197 5.425 5.654 5.885 6.116 6.346 6.576 6.804 7.031 7.255 7.476 7.694 7.909 8.119 8.324 8.525 8.719 8.908 9.09 9.264 9.43 9.588 9.736 9.874 10.002 10.118 10.221 10.311 10.388 10.45 10.498 10.53 10.547 10.55 10.549 10.543 10.53 10.51 10.484 10.451 10.414 10.37 10.322 10.268 10.21 10.148 10.081 10.011 9.937 9.859 9.778 9.695 9.608 9.52 9.428 9.335 9.24 9.143 9.044 8.944 8.843 8.74 8.637 8.533 8.428 8.323 8.217 8.111 8.004 7.898 7.791 7.685 7.578 7.472 7.367 7.261 7.156 7.052 6.948 6.845 6.742 6.641 6.539 6.439 6.34 6.241 6.144 6.047 5.951 5.856 5.763 5.67 5.578 5.488 5.398 5.309 5.222 5.136 5.05 4.966 4.883 4.801 4.72 4.641 4.562 4.485 4.408 4.333 4.259 4.185 4.113 4.042 3.973 3.904 3.836 3.769 3.704 3.639 3.575 3.513 3.451 3.39 3.331 3.272 3.214 3.157 3.101 3.046 2.992 2.939 2.887 2.835 2.785 2.735 2.686 2.638 2.591 2.545 2.499 2.454 2.41 2.367 2.324 2.283 2.242 2.201 2.162 2.123 2.084 2.047 2.01 1.973 1.938 1.903 1.868 1.834 1.801 1.769 1.736 1.705 1.674

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.323" PeakHeight="110.0" Num="3" Error="0.0">
-29.508 11.721 -2.535
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.323" EndFrequency="10.55" PeakHeight="367.913" Num="5" zHalfNm="254.629" Error="1.623">
-235.788 -4.617 3.015 -1.758 0.679
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.444" Depth="0.127"/>
<TopsideChapman PeakHeight="367.913" PeakDensity="1380924.4" PeakScaleHeight="84.551" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
