<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 04:30:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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) 04:30:00</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">
FF202629410210430009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.474" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.339" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.700" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="551.612" 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="3.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="455.247" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="390.682" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.795" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="96.294" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.970" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.573" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="106.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="59">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
410.000 415.000 420.000 420.000 421.667 423.333 425.000 428.333 431.667 435.000 435.000 435.000 435.833 436.667 437.500 438.333 439.167 440.000 445.000 450.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 510.337 510.698 511.087 511.506 511.959 512.451 512.986 513.571 514.213 514.920 515.704 516.577 517.556 518.661 519.917 521.359 523.031 524.992 527.326 530.148 533.631 538.036 543.787 551.612 562.879 580.498 611.953
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 54 0 0 0 0 0 0 0 0 54 0 0 0 0 0 0 0 57 57 0 0 51 0 0 51 0 0 0 0 0 48 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
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.171875 1.171875 1.171875 -2.734375 1.171875 2.734375 0.390625 1.171875 1.171875 1.171875 1.171875 2.734375 1.171875 0.390625 -1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 -1.171875 1.171875 1.171875 2.734375 1.171875 -1.171875 -0.390625 1.171875 -0.390625 -1.171875 1.171875 0.390625 -2.734375 1.171875 -1.953125 1.171875 -2.734375 -1.953125 2.734375 2.734375 0.390625 2.734375 -2.734375 -1.953125 1.171875 -1.953125 0.390625 2.734375 -1.953125 -1.953125 0.390625 0.390625 -1.171875 -0.390625 -1.953125 1.953125 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.955 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.91 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 220.865 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 455.247 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</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 0.334 0.317 0.294 0.263 0.221 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.205 0.225 0.246 0.267 0.288 0.309 0.33 0.35 0.354 0.401 0.457 0.516 0.579 0.646 0.719 0.797 0.881 0.971 1.066 1.167 1.273 1.384 1.499 1.617 1.739 1.865 1.993 2.123 2.257 2.392 2.53 2.67 2.812 2.957 3.104 3.253 3.404 3.558 3.714 3.872 4.033 4.196 4.361 4.529 4.698 4.869 5.041 5.214 5.385 5.552 5.713 5.864 5.996 6.103 6.174 6.2 6.2 6.194 6.176 6.146 6.105 6.054 5.995 5.927 5.852 5.771 5.684 5.592 5.496 5.396 5.293 5.187 5.08 4.971 4.861 4.75 4.639 4.528 4.417 4.306 4.196 4.088 3.98 3.874 3.769 3.666 3.564 3.464 3.366 3.27 3.176 3.084 2.994 2.906 2.82 2.736 2.654 2.574 2.497 2.421 2.347 2.275 2.205 2.137 2.071 2.007 1.945 1.884 1.825 1.768 1.713 1.659 1.607 1.556 1.507 1.459 1.413 1.368 1.325 1.283 1.242 1.202 1.164 1.127 1.091 1.056 1.022 0.99 0.958 0.927 0.897 0.869 0.841 0.814 0.788 0.762 0.738 0.714 0.691 0.669 0.647 0.627 0.606 0.587 0.568 0.55 0.532 0.515 0.498 0.482 0.467 0.452 0.437 0.423 0.409 0.396 0.383 0.371 0.359 0.347 0.336 0.325 0.315 0.305 0.295 0.285

</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="6.2" PeakHeight="455.247" Num="5" zHalfNm="390.682" Error="3.631">
-212.247 -40.143 25.004 -9.512 2.516
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="110.865" Depth="0.154"/>
<TopsideChapman PeakHeight="455.247" PeakDensity="476923.06" PeakScaleHeight="47.573" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
