<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 19:40:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2o cusp not found, 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" >
2026.10.20 (293) 19:40:00</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">
FF202629310201940009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.536" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.137" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="7.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="471.964" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.218" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="386.951" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="264.237" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.470" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="172.526" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.723" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.046" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="173.730" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="72">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 10.5 10.55 10.6 10.65 10.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 345.000 346.667 348.333 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 393.036 396.071 399.107 402.143 405.179 408.214 411.250 414.286 417.321 420.357 423.393 426.429 429.464 432.500 435.536 438.571 441.607 444.643 447.679 450.714 453.750 456.786 459.821 462.857 465.893 468.929 471.964 475.000 480.000 483.742 487.853 492.390 497.423 503.039 509.344 516.474 524.602 533.953 544.827 557.626 572.914 591.493 614.556 643.947 682.685 736.073 814.359
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 57 54 57 57 57 51 0 0 42 0 54 0 0 42 36 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 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 -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 -2.734375 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.703 90.0 95.0 100.0 105.0 110.0 115.0 117.031 120.0 124.062 125.0 130.0 131.093 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 386.951 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.225 1.488 1.921 2.146 2.218 2.154 2.09 2.09 2.09 2.107 2.198 2.218 2.323 2.465 2.615 2.772 2.937 3.107 3.283 3.464 3.651 3.842 4.038 4.239 4.444 4.653 4.866 5.082 5.303 5.526 5.753 5.982 6.213 6.445 6.678 6.91 7.142 7.373 7.601 7.825 8.045 8.26 8.47 8.672 8.868 9.055 9.234 9.404 9.564 9.714 9.855 9.985 10.104 10.213 10.311 10.398 10.474 10.539 10.593 10.636 10.668 10.689 10.699 10.7 10.699 10.692 10.68 10.662 10.639 10.611 10.578 10.54 10.498 10.452 10.402 10.347 10.289 10.228 10.163 10.096 10.025 9.952 9.876 9.798 9.717 9.635 9.55 9.464 9.376 9.287 9.196 9.105 9.012 8.918 8.823 8.728 8.631 8.535 8.437 8.34 8.242 8.144 8.046 7.948 7.85 7.752 7.654 7.556 7.459 7.361 7.265 7.168 7.073 6.977 6.883 6.788 6.695 6.602 6.51 6.418 6.328 6.238 6.148 6.06 5.972 5.886 5.8 5.715 5.63 5.547 5.465 5.383 5.303 5.223 5.144 5.066 4.989 4.913 4.838 4.764 4.691 4.618 4.547 4.477 4.407 4.339 4.271 4.204 4.138 4.073 4.009 3.946 3.884 3.822 3.761 3.702 3.643 3.585 3.528 3.471 3.416 3.361 3.307 3.254 3.202 3.15 3.099 3.049 3.0 2.952 2.904 2.857 2.81 2.765 2.72 2.676 2.632 2.589 2.547 2.506 2.465 2.424 2.385 2.346 2.308 2.27 2.233

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.218" PeakHeight="110.0" Num="3" Error="0.0">
-29.378 11.539 -2.458
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.218" EndFrequency="10.7" PeakHeight="386.951" Num="5" zHalfNm="264.237" Error="1.834">
-260.845 8.115 -4.355 1.858 -0.631
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="21.093" Depth="0.128"/>
<TopsideChapman PeakHeight="386.951" PeakDensity="1420471.5" PeakScaleHeight="93.046" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
