<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-18 -291 20:00:00.000"
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="15.0">
<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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: 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" >
2026.10.18 (291) 20:00:00</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">
FF202629110182000009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.532" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.355" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="491.457" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.973" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="387.797" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="280.538" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.465" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="150.505" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.954" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="79.436" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="161.780" 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="105">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 310.000 312.500 315.000 310.000 313.333 316.667 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 345.000 347.170 349.340 351.510 353.680 355.851 358.021 360.191 362.361 364.531 366.701 368.871 371.041 373.212 375.382 377.552 379.722 381.892 384.062 386.232 388.402 390.572 392.743 394.913 397.083 399.253 401.423 403.593 405.763 407.933 410.104 412.274 414.444 416.614 418.784 420.954 423.124 425.294 427.464 429.635 431.805 433.975 436.145 438.315 440.485 442.655 444.825 446.996 449.166 451.336 453.506 455.676 457.846 460.016 462.186 464.356 466.527 468.697 470.867 473.037 475.207 477.377 479.547 481.717 483.888 486.058 488.228 491.457 494.996 498.890 503.196 507.984 515.000 520.000 525.000 535.000 545.000 555.000 565.000 580.000 600.000 625.000 650.000 692.005
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 0 60 72 0 0 60 69 72 60 0 66 60 66 72 72 72 75 69 72 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 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
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 1.171875 1.171875 2.734375 0.390625 -0.390625 -1.171875 -1.171875 1.171875 -1.171875 -1.953125 -0.390625 0.390625 -1.171875 -1.171875 -1.171875 0.390625 0.390625 2.734375 -1.171875 -0.390625 1.953125 1.953125 2.734375 -0.390625 0.390625 -2.734375 -2.734375 1.953125 1.953125 -0.390625 -1.171875 -1.171875 1.953125 -0.390625 -1.953125 -1.953125 2.734375 1.171875 1.171875 0.390625 -2.734375 0.390625 -1.171875 -1.953125 0.390625 1.953125 -1.953125 -1.171875 2.734375 2.734375 -2.734375 2.734375 1.953125 -1.171875 -1.953125 0.390625 -0.390625 2.734375 1.953125 2.734375 -0.390625 -2.734375 2.734375 2.734375 -2.734375 1.953125 -1.953125 -1.171875 0.390625 -1.171875 1.171875 1.953125 0.390625 1.953125 -1.171875 -0.390625 0.390625 1.171875 -2.734375 -2.734375
</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" >
89.768 90.0 95.0 100.0 105.0 110.0 115.0 118.362 120.0 125.0 126.725 130.0 135.0 135.087 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 387.797 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.22 1.322 1.709 1.909 1.973 1.926 1.84 1.84 1.84 1.84 1.892 1.972 1.973 2.115 2.265 2.42 2.582 2.75 2.924 3.105 3.292 3.485 3.683 3.887 4.095 4.307 4.522 4.74 4.961 5.184 5.408 5.634 5.86 6.087 6.314 6.542 6.769 6.996 7.222 7.448 7.672 7.896 8.117 8.337 8.555 8.769 8.981 9.189 9.393 9.592 9.785 9.971 10.149 10.318 10.477 10.624 10.758 10.877 10.979 11.064 11.129 11.173 11.197 11.2 11.199 11.191 11.175 11.151 11.12 11.081 11.036 10.984 10.926 10.863 10.794 10.72 10.641 10.558 10.471 10.379 10.285 10.187 10.086 9.982 9.876 9.768 9.657 9.545 9.431 9.316 9.199 9.082 8.964 8.844 8.725 8.605 8.485 8.364 8.244 8.124 8.004 7.884 7.765 7.646 7.528 7.41 7.293 7.177 7.062 6.948 6.834 6.722 6.611 6.501 6.392 6.284 6.177 6.072 5.968 5.865 5.763 5.663 5.563 5.466 5.369 5.274 5.18 5.088 4.997 4.907 4.818 4.731 4.645 4.561 4.477 4.396 4.315 4.236 4.158 4.081 4.005 3.931 3.858 3.786 3.716 3.646 3.578 3.511 3.445 3.38 3.317 3.254 3.193 3.132 3.073 3.015 2.958 2.902 2.847 2.792 2.739 2.687 2.636 2.586 2.536 2.488 2.44 2.393 2.348 2.303 2.258 2.215 2.172 2.131 2.09 2.05 2.01 1.971 1.934 1.896 1.86 1.824 1.789 1.754 1.72 1.687 1.654

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.973" PeakHeight="110.0" Num="3" Error="0.0">
-29.027 11.061 -2.266
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.973" EndFrequency="11.2" PeakHeight="387.797" Num="5" zHalfNm="280.538" Error="2.019">
-243.04 -17.121 10.533 -3.933 0.851
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="25.087" Depth="0.133"/>
<TopsideChapman PeakHeight="387.797" PeakDensity="1556327.5" PeakScaleHeight="79.436" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
