<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 20:10:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2o cusp not found, 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) 20:10:00</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">
FF202629310202010009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.614" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.968" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.050" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.817" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="368.244" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="267.719" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.447" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="141.618" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.307" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.958" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="146.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.950" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="19">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
455.000 461.667 468.333 475.000 475.000 480.000 485.000 495.000 500.000 510.000 515.000 525.000 536.667 548.333 560.000 570.000 585.000 607.704 636.782
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 51 54 48 42 51 51 45 51 45 0 0 48 45 45 42 42
</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 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -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" >
89.817 90.0 95.0 100.0 105.0 110.0 115.0 119.25 120.0 125.0 128.501 130.0 135.0 137.751 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 368.244 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.216 1.216 1.574 1.758 1.817 1.778 1.681 1.681 1.681 1.681 1.703 1.777 1.817 1.884 2.034 2.188 2.348 2.514 2.688 2.87 3.061 3.261 3.469 3.686 3.911 4.143 4.381 4.625 4.874 5.126 5.382 5.639 5.897 6.156 6.414 6.671 6.927 7.18 7.431 7.678 7.922 8.161 8.394 8.622 8.843 9.057 9.262 9.458 9.644 9.819 9.981 10.129 10.263 10.381 10.482 10.564 10.628 10.672 10.696 10.7 10.699 10.692 10.675 10.65 10.617 10.577 10.529 10.475 10.414 10.347 10.275 10.197 10.115 10.028 9.937 9.841 9.743 9.641 9.536 9.428 9.318 9.206 9.092 8.977 8.859 8.741 8.622 8.501 8.381 8.259 8.138 8.016 7.894 7.772 7.651 7.529 7.409 7.288 7.169 7.05 6.932 6.815 6.699 6.583 6.469 6.356 6.244 6.133 6.024 5.916 5.809 5.703 5.599 5.496 5.395 5.295 5.196 5.099 5.003 4.908 4.815 4.724 4.634 4.545 4.458 4.372 4.287 4.204 4.123 4.043 3.964 3.886 3.81 3.735 3.661 3.589 3.518 3.449 3.38 3.313 3.247 3.182 3.119 3.057 2.995 2.935 2.877 2.819 2.762 2.707 2.652 2.599 2.546 2.495 2.444 2.395 2.346 2.299 2.252 2.206 2.161 2.118 2.075 2.032 1.991 1.95 1.911 1.872 1.833 1.796 1.759 1.723 1.688 1.654 1.62 1.587 1.554 1.522 1.491 1.461 1.431 1.401 1.373 1.345 1.317 1.29 1.263

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.817" PeakHeight="110.0" Num="3" Error="0.0">
-28.764 10.714 -2.133
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.817" EndFrequency="10.7" PeakHeight="368.244" Num="5" zHalfNm="267.719" Error="1.814">
-227.124 -5.825 3.797 -2.222 0.881
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.751" Depth="0.136"/>
<TopsideChapman PeakHeight="368.244" PeakDensity="1420471.5" PeakScaleHeight="74.958" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
