<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-13 -286 20:30:00.000"
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="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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.10.13 (286) 20:30:00</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">
FF202628610132030009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.554" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.377" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.467" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="382.951" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="301.018" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.371" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="117.080" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.547" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.955" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="133.620" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.380" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="113">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.25 11.3 11.35 11.4 11.45 11.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 317.000 319.000 321.000 323.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 352.188 354.375 356.563 358.750 360.938 363.125 365.313 367.500 369.688 371.875 374.063 376.250 378.438 380.625 382.813 385.000 387.188 389.375 391.563 393.750 395.938 398.125 400.313 402.500 404.688 406.875 409.063 411.250 413.438 415.625 417.813 420.000 422.188 424.375 426.563 428.750 430.938 433.125 435.313 437.500 439.688 441.875 444.063 446.250 448.438 450.625 452.813 455.000 457.188 459.375 461.563 463.750 465.938 468.125 470.313 472.500 474.688 476.875 479.063 481.250 483.438 485.625 487.813 490.000 492.188 494.375 496.563 498.750 500.938 503.125 505.313 507.500 509.688 511.875 514.063 516.250 518.438 520.625 522.813 525.000 525.000 530.000 536.071 544.458 556.799 576.751
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
78 0 0 75 0 72 75 78 75 72 75 81 66 72 75 78 72 75 78 75 69 72 72 75 75 75 78 0 0 0 0 51 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 45 60 57 57 54 51 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -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 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 1.953125 2.734375 -2.734375 -1.171875 -1.953125 -1.171875 1.953125 2.734375 1.171875 -1.171875 -1.953125 1.171875 -0.390625 -2.734375 0.390625 -1.171875 0.390625 1.171875 1.953125 -1.171875 2.734375 -1.171875 2.734375 1.171875 -1.953125 1.953125 -0.390625 1.953125 2.734375 2.734375 2.734375 0.390625 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 -0.390625 1.171875 2.734375 -2.734375 -2.734375 1.171875 1.953125 2.734375 -0.390625 0.390625 1.171875 2.734375 0.390625 -1.171875 1.953125 0.390625 -1.171875 -2.734375 1.953125 1.953125 -1.953125 -1.171875 -0.390625 -2.734375 -1.953125 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125
</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" >
89.952 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.509 125.0 130.0 133.019 135.0 140.0 144.528 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 382.951 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.204 0.98 1.271 1.42 1.467 1.44 1.356 1.319 1.319 1.319 1.319 1.344 1.409 1.467 1.482 1.632 1.782 1.934 2.094 2.261 2.438 2.625 2.821 3.026 3.239 3.458 3.683 3.912 4.144 4.377 4.61 4.844 5.078 5.312 5.544 5.776 6.008 6.239 6.47 6.7 6.93 7.16 7.391 7.621 7.853 8.084 8.317 8.551 8.785 9.021 9.258 9.495 9.734 9.972 10.209 10.443 10.673 10.893 11.097 11.274 11.409 11.487 11.5 11.499 11.484 11.455 11.412 11.355 11.287 11.207 11.116 11.015 10.906 10.789 10.664 10.532 10.395 10.252 10.105 9.953 9.799 9.641 9.48 9.318 9.154 8.989 8.823 8.656 8.49 8.324 8.158 7.992 7.828 7.665 7.503 7.342 7.184 7.026 6.871 6.718 6.567 6.418 6.271 6.127 5.984 5.845 5.707 5.573 5.44 5.31 5.183 5.058 4.935 4.815 4.698 4.582 4.47 4.359 4.252 4.146 4.043 3.942 3.843 3.747 3.653 3.561 3.471 3.383 3.298 3.214 3.132 3.052 2.975 2.899 2.825 2.752 2.682 2.613 2.546 2.481 2.417 2.355 2.294 2.235 2.177 2.121 2.066 2.013 1.961 1.91 1.86 1.812 1.765 1.72 1.675 1.631 1.589 1.548 1.508 1.468 1.43 1.393 1.357 1.321 1.287 1.254 1.221 1.189 1.158 1.128 1.099 1.07 1.042 1.015 0.988 0.963 0.937 0.913 0.889 0.866 0.843 0.821 0.8 0.779 0.759 0.739 0.72

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.467" PeakHeight="110.0" Num="3" Error="0.0">
-28.044 9.788 -1.792
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.467" EndFrequency="11.5" PeakHeight="382.951" Num="5" zHalfNm="301.018" Error="4.084">
-213.384 -44.576 28.228 -11.684 2.993
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="34.528" Depth="0.148"/>
<TopsideChapman PeakHeight="382.951" PeakDensity="1640818.9" PeakScaleHeight="58.955" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
