<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 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="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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.10.16 (289) 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">
FF202628910161940009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.654" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.914" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.400" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.510" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="89.534" Name="h`E" 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="11.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.000" 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="2.226" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="371.744" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="278.226" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.469" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="133.532" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.245" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.816" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="140.450" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.800" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="123">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.55 11.6 11.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 301.000 302.000 303.000 304.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 311.667 313.333 315.000 315.000 315.000 315.000 315.000 320.000 321.667 323.333 325.000 325.000 322.500 320.000 325.000 325.000 325.000 326.859 328.718 330.577 332.436 334.295 336.154 338.013 339.872 341.731 343.590 345.449 347.308 349.167 351.026 352.885 354.744 356.603 358.462 360.321 362.179 364.038 365.897 367.756 369.615 371.474 373.333 375.192 377.051 378.910 380.769 382.628 384.487 386.346 388.205 390.064 391.923 393.782 395.641 397.500 399.359 401.218 403.077 404.936 406.795 408.654 410.513 412.372 414.231 416.090 417.949 419.808 421.667 423.526 425.385 427.244 429.103 430.962 432.821 434.679 436.538 438.397 440.256 442.115 443.974 445.833 447.692 449.551 451.410 453.269 455.128 456.987 458.846 460.705 462.564 464.423 466.282 468.141 470.000 480.000 480.000 490.000 495.000 505.000 515.000 525.000 540.000 555.000 575.000 606.609 653.109
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 63 0 0 0 63 0 63 0 0 0 0 0 69 54 0 0 0 0 60 66 0 69 75 0 69 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 54 51 60 60 63 63 63 63 66 69 66 51 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -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 1.171875 -2.734375 -0.390625 1.171875 -0.390625 0.390625 -2.734375 -1.953125 -0.390625 -2.734375 -2.734375 1.171875 1.171875 -2.734375 -1.171875 1.171875 1.171875 -1.171875 -1.953125 -2.734375 -1.953125 -2.734375 0.390625 -1.171875 -1.171875 -0.390625 -2.734375 2.734375 -1.171875 -2.734375 1.171875 0.390625 -1.171875 -1.953125 -1.171875 -1.171875 2.734375 1.171875 1.953125 -1.953125 -1.953125 -2.734375 -1.171875 -0.390625 -2.734375 -1.953125 1.171875 0.390625 1.953125 1.953125 1.171875 -1.171875 -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 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.4 1.45 1.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
89.534 89.935 90.365
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625
</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" >
89.932 90.0 95.0 100.0 105.0 110.0 115.0 116.988 120.0 123.975 125.0 130.0 130.963 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 371.744 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.206 1.009 1.308 1.461 1.51 1.466 1.423 1.423 1.423 1.436 1.498 1.51 1.621 1.764 1.916 2.076 2.244 2.42 2.605 2.798 2.998 3.206 3.422 3.644 3.872 4.106 4.346 4.591 4.841 5.095 5.353 5.615 5.88 6.147 6.417 6.689 6.962 7.237 7.512 7.787 8.061 8.335 8.606 8.874 9.138 9.397 9.65 9.896 10.133 10.36 10.574 10.774 10.959 11.125 11.272 11.397 11.498 11.575 11.625 11.648 11.65 11.648 11.634 11.611 11.577 11.533 11.48 11.418 11.348 11.271 11.186 11.095 10.998 10.896 10.788 10.675 10.558 10.437 10.313 10.185 10.055 9.922 9.787 9.65 9.512 9.372 9.231 9.09 8.948 8.806 8.663 8.521 8.379 8.237 8.096 7.955 7.815 7.676 7.538 7.401 7.266 7.131 6.998 6.866 6.736 6.608 6.481 6.355 6.231 6.109 5.989 5.87 5.753 5.638 5.525 5.413 5.304 5.196 5.09 4.985 4.883 4.782 4.683 4.585 4.49 4.396 4.304 4.214 4.125 4.038 3.953 3.869 3.787 3.706 3.627 3.55 3.474 3.4 3.327 3.255 3.185 3.117 3.05 2.984 2.919 2.856 2.794 2.734 2.674 2.616 2.56 2.504 2.449 2.396 2.344 2.293 2.243 2.194 2.146 2.099 2.053 2.008 1.964 1.921 1.879 1.838 1.797 1.758 1.719 1.682 1.645 1.609 1.573 1.539 1.505 1.472 1.439 1.408 1.377 1.346 1.317 1.288 1.259 1.232 1.204 1.178 1.152

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.51" PeakHeight="110.0" Num="3" Error="0.0">
-28.145 9.915 -1.838
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.51" EndFrequency="11.65" PeakHeight="371.744" Num="5" zHalfNm="278.226" Error="1.297">
-232.788 -13.896 7.923 -2.456 0.436
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="20.963" Depth="0.087"/>
<TopsideChapman PeakHeight="371.744" PeakDensity="1683902.0" PeakScaleHeight="69.816" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
