<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 21:40:00.000"
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="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 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" >
2026.10.21 (294) 21:40:00</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">
FF202629410212140009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.813" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.568" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="410.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="410.000" 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="6.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="462.082" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="373.867" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="325.864" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.745" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="71.769" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.312" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="34.932" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="78.340" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.470" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="35">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
410.000 411.667 413.333 415.000 415.000 416.316 417.632 418.947 420.263 421.579 422.895 424.211 425.526 426.842 428.158 429.474 430.789 432.105 433.421 434.737 436.053 437.368 438.684 440.000 440.874 441.874 443.030 444.379 445.976 447.896 450.247 453.193 456.993 462.082 469.247
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 69 0 0 0 0 0 0 57 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -0.390625 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="151">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 140.292 145.0 150.0 155.0 160.0 165.0 170.0 170.585 175.0 180.0 185.0 190.0 195.0 200.0 200.877 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.867 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.323 0.297 0.259 0.204 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.248 0.273 0.299 0.324 0.35 0.354 0.437 0.517 0.597 0.684 0.781 0.891 1.015 1.156 1.312 1.484 1.667 1.859 2.058 2.261 2.467 2.675 2.884 3.095 3.308 3.522 3.738 3.956 4.177 4.401 4.627 4.857 5.09 5.326 5.564 5.801 6.034 6.253 6.441 6.567 6.6 6.599 6.581 6.539 6.476 6.394 6.297 6.185 6.061 5.927 5.785 5.637 5.484 5.327 5.167 5.006 4.845 4.684 4.524 4.366 4.21 4.057 3.907 3.76 3.617 3.477 3.341 3.209 3.082 2.958 2.838 2.723 2.611 2.503 2.4 2.3 2.203 2.111 2.022 1.936 1.854 1.775 1.7 1.627 1.558 1.491 1.427 1.365 1.306 1.25 1.196 1.144 1.095 1.047 1.002 0.959 0.917 0.877 0.839 0.802 0.767 0.734 0.702 0.672 0.642 0.614 0.587 0.562 0.537 0.514 0.491 0.47 0.449 0.43 0.411 0.393 0.376 0.359 0.344 0.329 0.314 0.301 0.288 0.275 0.263 0.251 0.24 0.23 0.22 0.21 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="6.6" PeakHeight="373.867" Num="5" zHalfNm="325.864" Error="4.588">
-157.12 -30.267 20.25 -9.818 3.965
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="90.877" Depth="0.154"/>
<TopsideChapman PeakHeight="373.867" PeakDensity="540446.6" PeakScaleHeight="34.932" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
