<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-26 -299 00:30:00.000"
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="14.0">
<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 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Severe F-spread, F2o cusp not found, Multiple candidates for F2x 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" >
2026.10.26 (299) 00:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629910260030009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.779" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.680" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="474.035" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="379.053" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="329.899" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.405" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="72.558" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.856" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.498" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="74.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.750" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="82">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 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 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 7.5 7.55 7.6 7.65 7.7 7.75 7.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 317.500 320.000 320.000 320.833 321.667 322.500 323.333 330.000 335.000 340.000 347.500 355.000 362.500 370.000 370.385 370.769 371.154 371.538 371.923 372.308 372.692 373.077 373.462 373.846 374.231 374.615 375.000 375.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 376.250 377.500 378.750 380.000 376.000 372.000 368.000 364.000 360.000 356.000 352.000 348.000 344.000 340.000 345.000 354.000 363.000 372.000 381.000 390.000 390.000 403.333 416.667 430.000 443.333 456.667 470.000 470.000 470.000 470.052 470.110 470.174 470.247 470.329 470.424 470.533 470.660 470.811 470.992 471.214 471.492 471.851 472.332 473.010 474.035
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66 0 63 66 0 0 60 0 69 66 66 0 66 0 0 0 0 63 57 0 0 0 0 0 0 0 0 0 57 57 0 0 0 66 0 63 0 0 0 0 0 0 60 0 0 0 0 0 0 60 57 60 0 0 0 54 57 0 57 0 54 0 54 51 51 48 51 0 0 0 0 0 0 0 0 0 0 0 0 0 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 1.171875 1.171875 0.390625 -0.390625 0.390625 -0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 1.953125 0.390625 1.171875 1.953125 1.953125 0.390625 -1.953125 0.390625 1.171875 1.171875 1.171875 1.953125 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 1.953125 1.171875 0.390625 1.953125 1.171875 0.390625 0.390625 1.953125 -1.171875 0.390625 0.390625 1.171875 0.390625 1.171875 -0.390625 2.734375 0.390625 0.390625 1.953125 1.171875 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 1.953125 0.390625 1.953125 -2.734375 -1.171875 -0.390625 1.953125 -1.953125 -2.734375 2.734375 2.734375 1.171875 2.734375 2.734375 2.734375 2.734375 1.953125 1.171875 1.953125 2.734375 2.734375 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="160">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.623 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.247 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.87 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.053 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.316 0.293 0.261 0.218 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.207 0.228 0.249 0.27 0.291 0.312 0.334 0.354 0.357 0.459 0.559 0.668 0.791 0.93 1.09 1.27 1.472 1.694 1.933 2.188 2.456 2.734 3.022 3.317 3.619 3.926 4.239 4.556 4.876 5.198 5.522 5.845 6.163 6.475 6.774 7.055 7.306 7.519 7.679 7.775 7.8 7.799 7.78 7.736 7.668 7.58 7.473 7.351 7.215 7.068 6.911 6.746 6.575 6.399 6.22 6.039 5.857 5.675 5.493 5.313 5.134 4.958 4.785 4.615 4.449 4.287 4.128 3.974 3.824 3.679 3.538 3.401 3.268 3.14 3.017 2.897 2.782 2.671 2.563 2.46 2.361 2.265 2.173 2.084 1.999 1.917 1.839 1.763 1.691 1.621 1.554 1.49 1.428 1.369 1.312 1.258 1.206 1.156 1.107 1.061 1.017 0.975 0.934 0.895 0.858 0.822 0.788 0.755 0.723 0.693 0.664 0.636 0.61 0.584 0.56 0.536 0.514 0.492 0.472 0.452 0.433 0.415 0.398 0.381 0.365 0.35 0.335 0.321 0.308 0.295 0.282 0.271 0.259 0.248 0.238 0.228 0.218 0.209 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="7.8" PeakHeight="379.053" Num="5" zHalfNm="329.899" Error="6.191">
-154.336 -11.978 9.809 -4.538 1.86
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.87" Depth="0.154"/>
<TopsideChapman PeakHeight="379.053" PeakDensity="754838.7" PeakScaleHeight="36.498" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
