<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-28 -059 21:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.02.28 (059) 21:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605902282150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.554" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.242" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="11.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.470" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="416.919" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="357.768" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.974" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="88.853" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.050" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.557" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="96.600" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="160">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 330.000 330.556 331.111 331.667 332.222 332.778 333.333 333.889 334.444 335.000 335.000 335.000 335.000 336.000 337.000 338.000 339.000 340.000 341.000 342.000 343.000 344.000 345.000 345.000 345.000 347.500 350.000 352.500 355.000 355.000 355.000 355.000 355.000 357.500 360.000 361.667 363.333 365.000 365.000 365.000 365.000 366.000 367.000 368.000 369.000 370.000 371.667 373.333 375.000 376.250 377.500 378.750 380.000 385.000 385.000 385.000 385.000 385.000 385.000 390.000 391.667 393.333 395.000 395.000 396.429 397.857 399.286 400.714 402.143 403.571 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 416.667 418.333 420.000 420.000 425.000 425.000 426.667 428.333 430.000 430.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 447.500 450.000 455.000 455.000 455.000 455.000 460.000 460.000 460.000 460.000 465.000 465.000 465.000 470.000 470.000 472.000 474.000 476.000 478.000 480.000 480.000 480.000 480.000 480.000 481.667 483.333 485.000 486.667 488.333 490.000 492.500 495.000 497.500 500.000 502.500 505.000 506.667 508.333 510.000 515.000 515.000 520.000 522.500 525.000 527.500 530.000 525.000 527.500 530.000 535.000 537.500 540.000 544.539
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 57 48 48 0 0 0 57 48 0 0 0 0 0 0 0 0 63 48 60 0 0 0 0 0 0 0 51 0 0 54 57 0 0 0 0 54 0 0 0 60 54 60 0 0 51 48 45 0 0 0 60 0 57 0 0 60 0 0 0 51 45 0 51 54 0 0 54 0 0 57 60 0 0 0 0 60 0 63 63 51 51 57 63 57 63 63 0 0 66 69 63 66 0 0 63 63 48 0 60 66 60 63 69 63 66 63 0 66 51 54 0 63 54 60 0 63 60 60 60 57 57 0 0 60 0 60 60 51 57 57 0 0 60 0 0 60 0 57 0 54 0 54 0 0 51 51 51 42 0 0 0 42 48 0 54 51 0 51 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -1.171875 -1.171875 -0.390625 1.953125 -1.171875 -0.390625 -1.171875 -2.734375 -1.171875 -0.390625 -1.171875 1.953125 1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 0.390625 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -0.390625 -1.953125 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.888 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.342 140.0 145.0 150.0 155.0 160.0 165.0 166.684 170.0 175.0 180.0 185.0 190.0 195.0 195.026 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 416.919 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.311 0.407 0.455 0.47 0.464 0.445 0.413 0.362 0.282 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.232 0.279 0.327 0.374 0.422 0.47 0.47 0.601 0.706 0.809 0.918 1.035 1.162 1.301 1.453 1.619 1.8 1.994 2.202 2.422 2.653 2.895 3.145 3.403 3.667 3.938 4.215 4.496 4.783 5.074 5.37 5.671 5.976 6.286 6.601 6.921 7.246 7.575 7.909 8.248 8.591 8.937 9.285 9.633 9.978 10.314 10.634 10.926 11.172 11.352 11.442 11.45 11.444 11.413 11.356 11.274 11.171 11.049 10.909 10.754 10.585 10.404 10.214 10.014 9.808 9.596 9.379 9.159 8.936 8.713 8.488 8.264 8.041 7.819 7.599 7.381 7.167 6.955 6.747 6.543 6.343 6.146 5.954 5.767 5.583 5.405 5.23 5.061 4.896 4.735 4.579 4.427 4.28 4.137 3.998 3.863 3.733 3.606 3.484 3.365 3.25 3.139 3.031 2.927 2.827 2.729 2.635 2.544 2.456 2.371 2.288 2.209 2.132 2.058 1.986 1.917 1.85 1.785 1.723 1.663 1.605 1.549 1.494 1.442 1.391 1.343 1.296 1.25 1.206 1.164 1.123 1.084 1.046 1.009 0.973 0.939 0.906 0.874 0.844 0.814 0.785 0.758 0.731 0.705 0.68 0.656 0.633 0.611 0.59 0.569 0.549 0.529 0.511 0.493 0.475 0.459 0.443 0.427 0.412 0.397 0.383 0.37 0.357 0.344 0.332 0.321 0.309 0.298 0.288

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.47" PeakHeight="110.0" Num="3" Error="0.0">
-21.777 4.01 -0.345
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.47" EndFrequency="11.45" PeakHeight="416.919" Num="5" zHalfNm="357.768" Error="5.53">
-204.932 -35.389 24.214 -9.782 3.996
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="85.026" Depth="0.27"/>
<TopsideChapman PeakHeight="416.919" PeakDensity="1626581.9" PeakScaleHeight="43.557" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
