<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 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="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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, F2 cusps do not match, Trace overlaps while constructing baseline</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) 21:50:00</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">
FF202628910162150009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.356" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.150" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="595.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="475.032" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="393.715" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.627" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="120.126" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.783" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.858" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="122.210" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.830" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="134">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 387.500 390.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 407.500 410.000 410.000 410.000 415.000 420.000 425.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 420.000 435.000 430.000 420.000 420.000 405.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 395.000 390.000 395.000 395.000 397.500 400.000 400.000 401.667 403.333 405.000 405.000 405.000 405.000 405.000 405.000 407.468 409.935 412.403 414.870 417.338 419.805 422.273 424.740 427.208 429.675 432.143 434.610 437.078 439.545 442.013 444.481 446.948 449.416 451.883 454.351 456.818 459.286 461.753 464.221 466.688 469.156 471.623 474.091 476.558 479.026 481.494 483.961 486.429 488.896 491.364 493.831 496.299 498.766 501.234 503.701 506.169 508.636 511.104 513.571 516.039 518.506 520.974 523.442 525.909 528.377 530.844 533.312 535.779 538.247 540.714 543.182 545.649 548.117 550.584 553.052 555.519 557.987 560.455 562.922 565.390 567.857 570.325 572.792 575.260 577.727 580.195 582.662 585.130 587.597 590.065 592.532 595.000 605.000 618.223 633.327 650.743 671.047
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 69 66 72 66 66 75 75 69 63 69 69 69 72 69 69 69 60 63 66 69 72 66 66 63 63 69 60 0 81 78 0 72 78 66 75 72 0 84 78 81 81 78 0 78 87 84 84 75 0 78 0 81 84 75 0 81 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 48 0 0 0 0 0 45 54 0 54 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 -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 -1.953125 -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 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 0.390625 2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 1.171875 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 -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 1.953125 -0.390625 -0.390625 1.953125 -0.390625 1.953125 1.953125 -1.953125 1.953125 1.171875 -0.390625 2.734375 0.390625 2.734375 -0.390625 -2.734375 1.953125 -0.390625 -0.390625 1.171875 1.953125 -2.734375 -0.390625 2.734375 -0.390625 2.734375 -0.390625 -0.390625 -1.953125 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.137 145.0 150.0 155.0 160.0 165.0 170.0 172.274 175.0 180.0 185.0 190.0 195.0 200.0 203.411 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 475.032 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.3 0.265 0.215 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.238 0.263 0.288 0.312 0.337 0.354 0.371 0.426 0.487 0.554 0.629 0.711 0.802 0.902 1.011 1.13 1.258 1.397 1.545 1.703 1.87 2.046 2.231 2.425 2.626 2.836 3.053 3.278 3.51 3.748 3.993 4.245 4.502 4.765 5.034 5.307 5.586 5.869 6.156 6.446 6.739 7.034 7.331 7.628 7.925 8.22 8.512 8.8 9.081 9.354 9.617 9.867 10.102 10.318 10.514 10.685 10.83 10.946 11.031 11.083 11.1 11.1 11.093 11.072 11.038 10.991 10.933 10.865 10.786 10.698 10.601 10.497 10.385 10.267 10.143 10.014 9.88 9.741 9.6 9.455 9.307 9.157 9.005 8.852 8.698 8.543 8.387 8.231 8.076 7.921 7.766 7.612 7.459 7.307 7.156 7.007 6.859 6.713 6.569 6.426 6.286 6.147 6.011 5.876 5.744 5.614 5.486 5.36 5.236 5.115 4.996 4.879 4.765 4.652 4.542 4.435 4.329 4.225 4.124 4.025 3.928 3.833 3.74 3.649 3.561 3.474 3.389 3.306 3.225 3.146 3.068 2.993 2.919 2.847 2.776 2.707 2.64 2.575 2.511 2.448 2.387 2.328 2.27 2.213 2.158 2.104 2.051 2.0 1.95 1.901 1.853 1.807 1.761 1.717 1.674 1.632 1.591 1.551 1.512 1.474 1.437 1.4 1.365 1.331 1.297 1.264 1.232

</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="11.1" PeakHeight="475.032" Num="5" zHalfNm="393.715" Error="4.252">
-267.124 -12.812 12.427 -5.327 1.215
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.411" Depth="0.154"/>
<TopsideChapman PeakHeight="475.032" PeakDensity="1528660.0" PeakScaleHeight="60.858" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
