<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-11 -284 22:20:00.000"
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="18.0">
<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 33 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Severe F-spread, F2x cusp not found, Multiple candidates for F2o cusp, 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" >
2026.10.11 (284) 22:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" 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">
FF202628410112220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="13.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.927" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="38.925" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.900" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="415.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="370.428" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="321.243" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.283" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="72.344" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.445" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.927" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="72.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.960" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="158">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2 13.25 13.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 310.000 310.000 370.000 355.000 340.000 325.000 322.500 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.805 321.610 322.415 323.220 324.025 324.831 325.636 326.441 327.246 328.051 328.856 329.661 330.466 331.271 332.076 332.881 333.686 334.492 335.297 336.102 336.907 337.712 338.517 339.322 340.127 340.932 341.737 342.542 343.347 344.153 344.958 345.763 346.568 347.373 348.178 348.983 349.788 350.593 351.398 352.203 353.008 353.814 354.619 355.424 356.229 357.034 357.839 358.644 359.449 360.254 361.059 361.864 362.669 363.475 364.280 365.085 365.890 366.695 367.500 368.305 369.110 369.915 370.720 371.525 372.331 373.136 373.941 374.746 375.551 376.356 377.161 377.966 378.771 379.576 380.381 381.186 381.992 382.797 383.602 384.407 385.212 386.017 386.822 387.627 388.432 389.237 390.042 390.847 391.653 392.458 393.263 394.068 394.873 395.678 396.483 397.288 398.093 398.898 399.703 400.508 401.314 402.119 402.924 403.729 404.534 405.339 406.144 406.949 407.754 408.559 409.364 410.169 410.975 411.780 412.585 413.390 414.195 415.000 419.694 425.322 432.194 440.773 451.786 466.440 486.898 517.460
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 69 66 60 54 60 63 63 60 57 0 0 0 66 0 57 57 60 63 60 69 66 60 60 60 0 63 60 66 66 66 60 0 60 60 0 0 0 0 0 0 0 54 54 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 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 45 48 0 0 0 0 0 0 0 0 0 45 0 0 45 0 0 42 0 0 0 0 0 0 0 48 0 0 0 0 45 0 0 0 0 0 0 0 0 0 42 45 42 45 0 0 45 45 48 48 0 0 45 45 45 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 1.171875 1.171875 -1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 1.953125 1.171875 0.390625 1.953125 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 1.953125 1.171875 1.953125 1.171875 1.171875 1.953125 1.171875 1.953125 1.953125 1.953125 1.171875 1.953125 1.953125 1.171875 -0.390625 -0.390625 1.171875 1.171875 1.953125 0.390625 1.953125 1.171875 -1.953125 1.171875 1.953125 0.390625 1.953125 -1.171875 0.390625 -0.390625 1.953125 1.953125 0.390625 -1.171875 1.953125 -0.390625 1.953125 1.171875 1.171875 -0.390625 -2.734375 1.953125 -0.390625 1.953125 1.953125 1.953125 1.953125 -1.171875 0.390625 -1.953125 -1.171875 -1.953125 1.953125 1.171875 -0.390625 1.953125 -0.390625 -0.390625 -1.171875 -0.390625 1.171875 -1.171875 -0.390625 -0.390625 -1.171875 1.171875 1.953125 2.734375 -1.953125 -0.390625 -1.171875 2.734375 1.953125 -1.171875 -1.171875 2.734375 2.734375 -1.171875 -1.171875 1.953125 -0.390625 -2.734375 -1.171875 -2.734375 -1.953125 1.953125 1.953125 -1.171875 -1.171875 -1.171875 0.390625 0.390625 1.953125 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -0.390625 -1.953125 -0.390625 -1.953125 -0.390625 -2.734375 -2.734375 -0.390625 -2.734375 1.171875 -1.171875 -1.171875 1.171875 1.953125 1.953125 -0.390625 -1.953125 -0.390625 2.734375 1.171875 -1.171875 0.390625 -0.390625 -1.953125 -1.171875 -1.953125 -0.390625 -1.171875 -1.953125 -2.734375 -0.390625 1.171875 -2.734375 -2.734375 2.734375 -0.390625 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="172">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.014 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.028 180.0 185.0 190.0 195.0 200.0 205.0 209.042 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.428 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.328 0.307 0.276 0.234 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.219 0.242 0.265 0.288 0.312 0.335 0.354 0.371 0.469 0.59 0.735 0.909 1.114 1.351 1.623 1.929 2.269 2.644 3.053 3.495 3.968 4.472 5.003 5.561 6.141 6.742 7.358 7.985 8.618 9.249 9.87 10.473 11.048 11.582 12.064 12.482 12.824 13.079 13.24 13.3 13.3 13.281 13.218 13.115 12.976 12.806 12.609 12.387 12.146 11.887 11.614 11.329 11.036 10.737 10.433 10.127 9.819 9.512 9.207 8.904 8.606 8.311 8.022 7.739 7.462 7.191 6.927 6.67 6.421 6.178 5.943 5.715 5.495 5.281 5.075 4.876 4.684 4.499 4.32 4.148 3.982 3.822 3.669 3.521 3.379 3.242 3.11 2.984 2.862 2.746 2.634 2.526 2.423 2.324 2.228 2.137 2.049 1.965 1.884 1.807 1.732 1.661 1.593 1.527 1.464 1.404 1.346 1.29 1.237 1.186 1.137 1.09 1.045 1.001 0.96 0.92 0.882 0.846 0.811 0.777 0.745 0.714 0.685 0.656 0.629 0.603 0.578 0.554 0.531 0.509 0.488 0.468 0.449 0.43 0.412 0.395 0.379 0.363 0.348 0.334 0.32 0.307 0.294 0.282 0.27 0.259 0.248 0.238 0.228 0.219 0.209 0.201

</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="13.3" PeakHeight="370.428" Num="5" zHalfNm="321.243" Error="1.31">
-161.525 -2.438 4.007 -1.731 0.301
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="99.042" Depth="0.154"/>
<TopsideChapman PeakHeight="370.428" PeakDensity="2194665.0" PeakScaleHeight="36.927" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
