<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 21:20:00.000"
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="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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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) 21:20:00</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">
FF202628910162120009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.460" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.549" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="10.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="526.547" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.508" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="440.338" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="357.668" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.968" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="120.734" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.854" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.864" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="120.000" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="101">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 375.000 375.000 376.667 378.333 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 380.000 380.000 385.000 390.000 395.000 390.000 390.000 392.038 394.076 396.114 398.152 400.190 402.228 404.266 406.304 408.342 410.380 412.418 414.456 416.494 418.532 420.570 422.608 424.646 426.684 428.722 430.760 432.798 434.836 436.874 438.912 440.950 442.989 445.027 447.065 449.103 451.141 453.179 455.217 457.255 459.293 461.331 463.369 465.407 467.445 469.483 471.521 473.559 475.597 477.635 479.673 481.711 483.749 485.787 487.825 489.863 491.901 493.939 495.977 498.015 500.053 502.091 504.129 506.167 508.205 510.243 512.281 514.319 516.357 518.395 520.433 522.471 524.509 526.547 531.280 535.000 540.000 550.000 555.000 565.000 570.000 580.000 590.000 605.000 620.000 635.000 653.739
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 54 0 0 72 72 78 78 75 72 75 75 72 78 75 75 0 69 78 75 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 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 1.171875 -2.734375 -1.953125 -1.171875 0.390625 1.953125 2.734375 -0.390625 -2.734375 2.734375 2.734375 1.953125 -1.171875 2.734375 1.953125 1.953125 -1.171875 1.171875 -0.390625 -2.734375 2.734375 -0.390625 1.953125 1.953125 0.390625 -1.953125 -1.953125 -2.734375 2.734375 -0.390625 1.171875 -1.953125 -1.953125 0.390625 2.734375 -1.171875 1.171875 2.734375 -1.171875 -0.390625 -1.953125 -0.390625 2.734375 2.734375 2.734375 -1.953125 -1.953125 -1.953125 0.390625 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -1.171875 1.953125 -2.734375 -0.390625 1.953125 2.734375 2.734375 -1.953125 2.734375 -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" >
91.591 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 137.825 140.0 145.0 150.0 155.0 160.0 165.0 165.649 170.0 175.0 180.0 185.0 190.0 193.474 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 440.338 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.336 0.44 0.492 0.508 0.501 0.48 0.443 0.386 0.295 0.215 0.215 0.215 0.215 0.215 0.215 0.215 0.215 0.261 0.313 0.366 0.419 0.471 0.508 0.533 0.614 0.699 0.788 0.884 0.989 1.103 1.227 1.363 1.511 1.672 1.846 2.034 2.237 2.452 2.681 2.923 3.176 3.44 3.714 3.996 4.287 4.585 4.889 5.198 5.511 5.828 6.148 6.469 6.791 7.113 7.434 7.751 8.066 8.375 8.677 8.972 9.257 9.53 9.79 10.034 10.26 10.467 10.652 10.813 10.948 11.055 11.134 11.182 11.2 11.2 11.194 11.174 11.142 11.097 11.041 10.974 10.898 10.812 10.718 10.615 10.506 10.39 10.269 10.142 10.01 9.874 9.735 9.592 9.446 9.298 9.148 8.997 8.844 8.69 8.536 8.381 8.227 8.073 7.919 7.765 7.613 7.461 7.311 7.162 7.015 6.869 6.724 6.582 6.441 6.302 6.165 6.03 5.897 5.766 5.637 5.511 5.386 5.264 5.144 5.026 4.91 4.797 4.686 4.577 4.47 4.365 4.262 4.162 4.063 3.967 3.873 3.78 3.69 3.602 3.515 3.431 3.348 3.267 3.188 3.111 3.036 2.962 2.89 2.82 2.751 2.684 2.618 2.554 2.492 2.431 2.371 2.313 2.256 2.201 2.147 2.094 2.042 1.992 1.943 1.895 1.848 1.802 1.758 1.714 1.672 1.631 1.59 1.551 1.513 1.475 1.439 1.403 1.368 1.334 1.301 1.269 1.237 1.206 1.177 1.147 1.119 1.091

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.508" PeakHeight="110.0" Num="3" Error="0.0">
-22.433 4.437 -0.413
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.508" EndFrequency="11.2" PeakHeight="440.338" Num="5" zHalfNm="357.668" Error="2.507">
-247.279 -2.635 4.321 -2.753 1.482
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="83.474" Depth="0.293"/>
<TopsideChapman PeakHeight="440.338" PeakDensity="1556327.5" PeakScaleHeight="61.864" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
