<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 21:40:00.000"
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="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, 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) 21:40:00</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">
FF202628910162140009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.486" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.093" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.650" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="537.337" 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="4.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="450.349" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="376.539" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.744" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="109.037" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.906" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.346" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="111.440" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.800" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="127">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 375.000 377.500 380.000 382.500 385.000 386.250 387.500 388.750 390.000 390.000 390.000 395.000 395.000 400.000 390.000 395.000 400.000 405.000 405.000 410.000 410.000 410.000 412.500 415.000 415.000 415.000 415.000 415.000 415.000 415.000 415.000 408.333 401.667 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 411.742 413.483 415.225 416.966 418.708 420.449 422.191 423.932 425.674 427.415 429.157 430.898 432.640 434.381 436.123 437.864 439.606 441.347 443.089 444.830 446.572 448.314 450.055 451.797 453.538 455.280 457.021 458.763 460.504 462.246 463.987 465.729 467.470 469.212 470.953 472.695 474.436 476.178 477.919 479.661 481.402 483.144 484.885 486.627 488.369 490.110 491.852 493.593 495.335 497.076 498.818 500.559 502.301 504.042 505.784 507.525 509.267 511.008 512.805 514.784 516.974 519.411 522.140 525.215 528.707 532.708 537.337 545.000 550.000 555.000 565.000 580.000 595.000 615.000 644.748
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 72 0 66 0 0 0 60 54 75 72 69 69 75 78 75 75 78 75 78 78 72 78 72 72 78 78 72 0 69 0 69 78 72 63 69 69 66 69 81 78 75 81 78 0 75 84 81 84 0 78 72 0 0 78 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 51 0 0 0 0 0 0 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 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 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 -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 -2.734375 -1.171875 -0.390625 -0.390625 -1.953125 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 0.390625 -1.171875 -2.734375 2.734375 -0.390625 -0.390625 -0.390625 -2.734375 -2.734375 -2.734375 -1.171875 -1.953125 -2.734375 -2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 -1.953125 -2.734375 -2.734375 0.390625 -0.390625 -0.390625 -0.390625 2.734375 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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 140.272 145.0 150.0 155.0 160.0 165.0 170.0 170.543 175.0 180.0 185.0 190.0 195.0 200.0 200.815 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 450.349 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.323 0.297 0.259 0.204 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.223 0.248 0.274 0.299 0.324 0.35 0.354 0.401 0.464 0.536 0.616 0.706 0.806 0.916 1.036 1.166 1.306 1.456 1.617 1.787 1.966 2.155 2.354 2.561 2.778 3.003 3.237 3.48 3.731 3.991 4.258 4.533 4.816 5.106 5.402 5.704 6.013 6.326 6.643 6.963 7.285 7.608 7.93 8.25 8.564 8.872 9.17 9.455 9.725 9.975 10.203 10.404 10.575 10.713 10.814 10.877 10.9 10.9 10.893 10.869 10.83 10.776 10.709 10.629 10.538 10.437 10.326 10.206 10.079 9.945 9.804 9.658 9.507 9.352 9.194 9.033 8.87 8.704 8.538 8.37 8.202 8.034 7.866 7.699 7.532 7.367 7.202 7.039 6.878 6.719 6.561 6.406 6.253 6.102 5.954 5.808 5.664 5.524 5.385 5.25 5.117 4.986 4.859 4.734 4.611 4.492 4.375 4.26 4.148 4.039 3.933 3.828 3.727 3.627 3.531 3.436 3.344 3.254 3.166 3.081 2.998 2.917 2.837 2.76 2.685 2.612 2.541 2.472 2.404 2.338 2.274 2.212 2.151 2.092 2.035 1.979 1.924 1.871 1.82 1.77 1.721 1.673 1.627 1.582 1.539 1.496 1.455 1.415 1.375 1.337 1.3 1.264 1.229 1.195 1.162 1.13 1.098 1.068 1.038 1.01 0.982 0.954 0.928 0.902 0.877 0.853 0.829 0.806

</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="10.9" PeakHeight="450.349" Num="5" zHalfNm="376.539" Error="1.544">
-244.126 -13.465 11.503 -3.949 0.503
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="90.815" Depth="0.154"/>
<TopsideChapman PeakHeight="450.349" PeakDensity="1474069.5" PeakScaleHeight="55.346" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
