<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 10:10:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: 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" >
2026.10.21 (294) 10:10:00</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">
FF202629410211010009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.221" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.656" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="7.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" 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="10.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="345.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.479" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="266.154" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="202.900" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.576" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="85.383" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.724" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.339" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="99.070" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="60">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 290.000 290.000 292.500 295.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 291.719 293.438 295.156 296.875 298.594 300.313 302.031 303.750 305.469 307.188 308.906 310.625 312.344 314.063 315.781 317.500 319.219 320.938 322.656 324.375 326.094 327.813 329.531 331.250 332.969 334.688 336.406 338.125 339.844 341.563 343.281 345.000 350.000 352.500 355.000 345.000 355.000 360.000 363.503 367.847 373.377 380.654 390.661 405.292 428.710
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 69 0 0 60 0 0 0 0 0 0 60 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 0 51 54 0 48 63 63 51 51 0 51 60 42 54 39
</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 -0.390625 0.390625 -1.953125 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="170">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.644 90.0 95.0 100.0 105.0 110.0 115.0 115.688 120.0 121.376 125.0 127.064 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 266.154 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23 1.664 2.146 2.399 2.479 2.383 2.354 2.354 2.354 2.434 2.479 2.626 2.894 3.186 3.502 3.837 4.186 4.542 4.897 5.248 5.593 5.93 6.26 6.583 6.9 7.211 7.517 7.82 8.118 8.412 8.703 8.99 9.27 9.542 9.8 10.036 10.236 10.381 10.447 10.45 10.443 10.413 10.361 10.289 10.199 10.093 9.972 9.837 9.691 9.535 9.369 9.197 9.018 8.833 8.645 8.453 8.259 8.063 7.867 7.67 7.474 7.278 7.084 6.892 6.701 6.514 6.328 6.146 5.967 5.792 5.62 5.451 5.286 5.125 4.967 4.813 4.664 4.518 4.375 4.237 4.102 3.971 3.844 3.72 3.6 3.483 3.37 3.26 3.154 3.05 2.95 2.853 2.759 2.668 2.58 2.494 2.411 2.331 2.254 2.179 2.106 2.036 1.968 1.902 1.838 1.777 1.717 1.659 1.604 1.55 1.498 1.447 1.399 1.352 1.306 1.262 1.219 1.178 1.139 1.1 1.063 1.027 0.993 0.959 0.927 0.895 0.865 0.836 0.808 0.78 0.754 0.728 0.704 0.68 0.657 0.635 0.613 0.593 0.572 0.553 0.534 0.516 0.499 0.482 0.466 0.45 0.435 0.42 0.406 0.392 0.379 0.366 0.353 0.342 0.33 0.319 0.308 0.298 0.287 0.278 0.268 0.259 0.25 0.242 0.234 0.226 0.218 0.211 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.479" PeakHeight="110.0" Num="3" Error="0.0">
-29.692 11.978 -2.642
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.479" EndFrequency="10.45" PeakHeight="266.154" Num="5" zHalfNm="202.9" Error="1.094">
-127.625 -19.699 12.481 -5.169 0.922
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.064" Depth="0.125"/>
<TopsideChapman PeakHeight="266.154" PeakDensity="1354869.8" PeakScaleHeight="45.339" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
