<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 09:10:00.000"
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="15.0">
<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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: 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" >
2026.10.16 (289) 09:10:00</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">
FF202628910160910009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="7.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.268" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.348" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.450" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.910" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="97.127" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="98.273" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.185" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="330.555" 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="1.748" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="257.828" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="196.932" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.170" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="82.191" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.306" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.313" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="94.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="39">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 280.000 280.000 281.000 282.000 283.000 284.000 285.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 310.000 315.000 315.000 315.000 320.000 320.000 321.528 323.283 325.318 327.708 330.555 334.001 338.260 343.657 350.720 360.358 374.296 396.236 435.847
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 75 0 69 0 0 0 72 78 81 69 0 0 75 72 69 72 69 75 60 69 75 66 72 72 69 69 72 69 72 72 69 0 0 0 0 54
</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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 1.171875 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
97.127 97.834 98.621 99.505 100.513 101.687 103.093 104.856 107.255 111.162
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 72 0 72 0 0 63 66
</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 1.953125 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="156">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.0 95.0 98.273 100.0 105.0 107.933 110.0 115.0 117.594 120.0 125.0 127.254 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 257.828 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.75 1.91 1.905 1.838 1.759 1.759 1.759 1.759 1.797 1.875 1.91 2.016 2.223 2.446 2.682 2.928 3.18 3.435 3.69 3.944 4.196 4.445 4.691 4.935 5.176 5.414 5.649 5.881 6.109 6.332 6.549 6.756 6.95 7.125 7.272 7.381 7.441 7.45 7.448 7.432 7.398 7.35 7.287 7.212 7.126 7.029 6.924 6.811 6.691 6.565 6.435 6.301 6.163 6.023 5.882 5.739 5.595 5.452 5.309 5.166 5.025 4.885 4.746 4.61 4.475 4.343 4.213 4.086 3.961 3.839 3.72 3.604 3.49 3.379 3.271 3.166 3.064 2.965 2.868 2.774 2.683 2.594 2.508 2.425 2.344 2.266 2.19 2.117 2.045 1.976 1.91 1.845 1.783 1.722 1.664 1.607 1.552 1.499 1.448 1.399 1.351 1.304 1.26 1.217 1.175 1.134 1.095 1.058 1.021 0.986 0.952 0.919 0.888 0.857 0.828 0.799 0.772 0.745 0.719 0.694 0.67 0.647 0.625 0.603 0.582 0.562 0.543 0.524 0.506 0.488 0.472 0.455 0.439 0.424 0.41 0.395 0.382 0.368 0.356 0.343 0.332 0.32 0.309 0.298 0.288 0.278 0.268 0.259 0.25 0.241 0.233 0.225 0.217 0.21 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.91" PeakHeight="98.273" Num="3" Error="1.147">
-11.838 4.471 -0.906
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.91" EndFrequency="7.45" PeakHeight="257.828" Num="5" zHalfNm="196.932" Error="1.258">
-120.858 -15.691 8.522 -2.93 0.383
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.981" Depth="0.151"/>
<TopsideChapman PeakHeight="257.828" PeakDensity="688616.6" PeakScaleHeight="44.313" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
