<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-22 -295 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="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 44 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Severe F-spread, F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.22 (295) 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">
FF202629510220030009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.917" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.458" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="426.700" 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="4.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="368.110" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="329.625" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.405" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="57.861" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.251" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="28.561" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="64.070" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.420" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="77">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 375.000 375.000 375.000 375.000 375.000 372.143 369.286 366.429 363.571 360.714 357.857 355.000 350.000 350.000 345.000 346.463 347.925 349.388 350.851 352.313 353.776 355.238 356.701 358.164 359.626 361.089 362.552 364.014 365.477 366.939 368.402 369.865 371.327 372.790 374.253 375.715 377.178 378.640 380.103 381.566 383.028 384.491 385.954 387.416 388.879 390.342 391.804 393.267 394.729 396.192 397.655 399.117 400.580 402.043 403.505 404.968 406.430 407.893 409.356 410.818 412.281 413.744 415.206 416.669 418.131 419.594 421.057 421.613 422.331 423.293 424.648 426.700 430.171 440.000 460.523
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 60 0 0 63 0 0 66 0 0 0 0 0 0 63 63 63 0 0 0 0 0 0 0 63 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 0 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 1.953125 1.171875 2.734375 2.734375 2.734375 1.171875 2.734375 2.734375 1.171875 2.734375 2.734375 2.734375 2.734375 1.953125 -0.390625 1.953125 1.953125 1.171875 0.390625 2.734375 -0.390625 2.734375 1.171875 1.171875 0.390625 1.953125 0.390625 1.171875 1.953125 1.171875 0.390625 1.171875 1.953125 2.734375 1.953125 0.390625 0.390625 1.953125 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 -1.171875 2.734375 1.171875 1.171875 1.953125 0.390625 1.953125 1.953125 0.390625 1.953125 2.734375 -0.390625 -0.390625 2.734375 0.390625 1.171875 1.953125 2.734375 1.171875 1.953125 0.390625 0.390625 2.734375 1.953125 2.734375 2.734375 0.390625 -1.953125 1.953125 1.953125 -2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="136">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.649 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.299 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.948 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 368.11 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0
</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 0.333 0.354 0.355 0.442 0.549 0.676 0.824 0.99 1.171 1.365 1.571 1.788 2.014 2.249 2.492 2.745 3.008 3.279 3.561 3.852 4.154 4.467 4.791 5.126 5.471 5.826 6.187 6.551 6.906 7.234 7.504 7.669 7.7 7.697 7.658 7.581 7.47 7.33 7.166 6.983 6.784 6.573 6.353 6.128 5.899 5.669 5.439 5.212 4.988 4.768 4.553 4.344 4.142 3.946 3.756 3.574 3.399 3.231 3.07 2.916 2.769 2.628 2.494 2.366 2.244 2.129 2.018 1.913 1.814 1.719 1.629 1.544 1.463 1.386 1.313 1.244 1.178 1.116 1.057 1.001 0.948 0.898 0.85 0.805 0.762 0.722 0.684 0.647 0.613 0.58 0.55 0.52 0.493 0.466 0.442 0.418 0.396 0.375 0.355 0.336 0.318 0.301 0.285 0.27 0.256 0.242 0.229 0.217 0.205

</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="7.7" PeakHeight="368.11" Num="5" zHalfNm="329.625" Error="2.215">
-134.433 -25.423 16.584 -5.655 0.765
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.948" Depth="0.154"/>
<TopsideChapman PeakHeight="368.11" PeakDensity="735607.94" PeakScaleHeight="28.561" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
