<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 18:10:00.000"
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) 18:10:00</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">
FF202628910161810009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.431" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.008" 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="11.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.165" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.908" 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="399.130" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.770" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.191" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="176.326" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.927" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="96.653" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="205.310" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.580" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="91">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 350.000 355.000 352.500 350.000 355.000 360.000 362.500 365.000 365.000 366.667 368.333 370.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 382.548 385.097 387.645 390.194 392.742 395.291 397.839 400.388 402.936 405.485 408.033 410.582 413.130 415.678 418.227 420.775 423.324 425.872 428.421 430.969 433.518 436.066 438.615 441.163 443.712 446.260 448.809 451.357 453.905 456.454 459.002 461.551 464.099 466.648 469.196 471.745 474.293 476.842 479.390 481.939 484.487 487.035 489.584 492.132 494.681 497.229 499.778 502.326 504.875 507.423 509.972 512.520 515.069 517.617 520.165 525.000 530.000 535.000 545.000 550.000 560.000 570.000 580.000 590.000 605.000 620.000 635.000 660.000 685.000 715.000 750.064
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 0 0 69 0 63 0 0 60 0 0 60 69 72 72 63 66 0 63 48 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 -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 -1.171875 -0.390625 -1.953125 0.390625 1.171875 -0.390625 1.953125 -1.953125 0.390625 0.390625 1.953125 -2.734375 1.171875 2.734375 1.171875 2.734375 1.171875 0.390625 -1.953125 1.171875 1.953125 -2.734375 1.953125 -0.390625 -0.390625 -2.734375 -1.953125 -1.171875 1.171875 -0.390625 1.953125 1.953125 1.953125 -1.953125 -2.734375 2.734375 2.734375 -1.171875 -1.953125 2.734375 1.953125 0.390625 1.171875 -1.171875 0.390625 0.390625 -2.734375 1.171875 1.953125 0.390625 -2.734375 1.953125 1.171875 0.390625 -1.171875 -1.953125 1.953125 1.953125 0.390625 -0.390625 0.390625 -2.734375 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.561 90.0 95.0 100.0 105.0 110.0 113.633 115.0 117.267 120.0 120.9 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 399.13 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.955 2.517 2.814 2.908 2.786 2.786 2.786 2.878 2.908 3.028 3.177 3.33 3.485 3.641 3.798 3.954 4.111 4.268 4.425 4.581 4.738 4.894 5.051 5.207 5.364 5.521 5.678 5.836 5.994 6.153 6.312 6.472 6.633 6.794 6.955 7.117 7.28 7.443 7.606 7.77 7.933 8.097 8.26 8.423 8.584 8.745 8.904 9.06 9.215 9.366 9.513 9.656 9.793 9.924 10.049 10.165 10.272 10.37 10.456 10.531 10.593 10.641 10.675 10.695 10.7 10.7 10.696 10.687 10.673 10.654 10.629 10.601 10.567 10.53 10.488 10.443 10.394 10.341 10.285 10.226 10.164 10.098 10.031 9.96 9.888 9.813 9.736 9.657 9.576 9.494 9.41 9.324 9.237 9.15 9.061 8.971 8.88 8.788 8.696 8.603 8.51 8.417 8.323 8.228 8.134 8.04 7.945 7.851 7.756 7.662 7.568 7.474 7.38 7.287 7.195 7.102 7.01 6.919 6.828 6.738 6.648 6.559 6.47 6.383 6.295 6.209 6.123 6.038 5.954 5.871 5.788 5.707 5.626 5.545 5.466 5.388 5.31 5.233 5.157 5.082 5.008 4.934 4.862 4.79 4.719 4.649 4.58 4.512 4.445 4.378 4.312 4.247 4.183 4.12 4.058 3.996 3.936 3.876 3.817 3.758 3.701 3.644 3.588 3.533 3.479 3.425 3.373 3.32 3.269 3.219 3.169 3.12 3.071 3.023 2.976 2.93 2.884 2.839 2.795 2.751 2.708 2.666 2.624 2.583 2.542 2.502

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.908" PeakHeight="110.0" Num="3" Error="0.0">
-30.117 12.587 -2.909
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.908" EndFrequency="10.7" PeakHeight="399.13" Num="5" zHalfNm="268.77" Error="2.202">
-259.123 -30.099 12.381 -0.924 -0.465
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.9" Depth="0.122"/>
<TopsideChapman PeakHeight="399.13" PeakDensity="1420471.5" PeakScaleHeight="96.653" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
