<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 12:10:00.000"
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" >
2026.10.21 (294) 12:10:00</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">
FF202629410211210009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.880" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.093" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="430.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="430.000" 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="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" 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="3.146" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.245" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="282.209" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="192.591" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.980" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="122.545" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.972" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.235" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="129.850" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.020" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="6">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
9.85 9.9 9.95 10.0 10.05 10.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
430.000 438.944 451.305 469.502 498.944 554.721
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
42 60 48 54 45 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
</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" >
89.521 90.0 95.0 100.0 105.0 110.0 112.575 115.0 115.149 117.724 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 282.209 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.115 2.723 3.044 3.146 3.024 3.024 3.024 3.146 3.249 3.48 3.72 3.967 4.222 4.484 4.752 5.026 5.304 5.585 5.868 6.152 6.436 6.719 6.998 7.274 7.544 7.807 8.062 8.307 8.542 8.764 8.974 9.169 9.348 9.51 9.654 9.779 9.885 9.97 10.035 10.077 10.098 10.1 10.098 10.087 10.066 10.035 9.995 9.946 9.89 9.826 9.755 9.677 9.593 9.504 9.41 9.311 9.208 9.101 8.99 8.877 8.76 8.641 8.52 8.398 8.274 8.148 8.022 7.894 7.767 7.639 7.51 7.382 7.254 7.126 6.999 6.873 6.747 6.622 6.498 6.375 6.254 6.133 6.014 5.896 5.78 5.665 5.551 5.439 5.329 5.22 5.113 5.007 4.903 4.801 4.7 4.602 4.504 4.409 4.315 4.223 4.132 4.043 3.956 3.87 3.786 3.704 3.623 3.544 3.466 3.39 3.316 3.242 3.171 3.101 3.032 2.965 2.899 2.834 2.771 2.709 2.648 2.589 2.531 2.474 2.419 2.364 2.311 2.259 2.208 2.158 2.109 2.062 2.015 1.969 1.925 1.881 1.838 1.797 1.756 1.716 1.677 1.639 1.602 1.565 1.529 1.495 1.461 1.427 1.395 1.363 1.332 1.301 1.272 1.243 1.214 1.186 1.159 1.133 1.107 1.082 1.057 1.033 1.009 0.986 0.963 0.941 0.92 0.899 0.878 0.858 0.838 0.819 0.8 0.782 0.764 0.747 0.729 0.713 0.696 0.68 0.665 0.65 0.635 0.62 0.606 0.592

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.146" PeakHeight="110.0" Num="3" Error="0.0">
-30.315 12.878 -3.042
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.146" EndFrequency="10.1" PeakHeight="282.209" Num="5" zHalfNm="192.591" Error="0.229">
-164.261 -0.38 0.243 -0.139 0.052
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.724" Depth="0.122"/>
<TopsideChapman PeakHeight="282.209" PeakDensity="1265632.8" PeakScaleHeight="67.235" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
