<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 21:10:00.000"
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: 50% PACIFIC flags: F2o cusp not found, 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" >
2026.10.17 (290) 21:10:00</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">
FF202629010172110009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.508" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.095" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="10.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="507.414" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.642" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="426.567" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="342.065" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.071" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="122.637" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.751" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="63.436" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="120.990" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="105">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 355.000 355.000 360.000 361.250 362.500 363.750 365.000 366.000 367.000 368.000 369.000 370.000 371.000 372.000 373.000 374.000 375.000 375.000 380.000 382.500 385.000 382.500 380.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 391.919 393.838 395.758 397.677 399.596 401.515 403.435 405.354 407.273 409.192 411.112 413.031 414.950 416.869 418.789 420.708 422.627 424.546 426.466 428.385 430.304 432.223 434.143 436.062 437.981 439.900 441.820 443.739 445.658 447.577 449.496 451.416 453.335 455.254 457.173 459.093 461.012 462.931 464.850 466.770 468.689 470.608 472.527 474.447 476.366 478.285 480.204 482.124 484.043 485.962 487.881 489.801 491.720 493.639 495.558 497.478 499.397 501.813 504.473 507.414 510.683 514.340 518.456 523.125 530.000 535.000 540.000 550.000 560.000 575.000 590.000 610.000 635.000 674.627
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 69 87 0 69 0 84 0 78 0 0 0 0 0 0 0 84 75 78 0 69 0 78 78 0 0 0 0 81 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
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 -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 2.734375 -1.953125 -1.953125 -1.171875 -1.171875 -0.390625 -1.953125 -2.734375 -2.734375 -1.171875 -2.734375 2.734375 2.734375 0.390625 -0.390625 0.390625 1.953125 1.953125 1.171875 2.734375 -1.953125 -1.171875 2.734375 -1.953125 1.171875 -1.953125 -1.171875 -2.734375 2.734375 -2.734375 1.953125 -1.171875 1.953125 2.734375 2.734375 -0.390625 1.171875 -1.171875 1.953125 0.390625 1.171875 -0.390625 -1.953125 1.171875 -1.171875 1.953125 -1.953125 0.390625 1.953125 0.390625 1.953125 1.953125 2.734375 1.171875 2.734375 1.953125 1.171875 -1.953125 0.390625 -1.171875 2.734375 1.171875
</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" >
90.947 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.898 140.0 145.0 150.0 155.0 160.0 161.797 165.0 170.0 175.0 180.0 185.0 187.695 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 426.567 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.426 0.556 0.622 0.642 0.633 0.604 0.554 0.475 0.345 0.311 0.311 0.311 0.311 0.311 0.311 0.311 0.352 0.416 0.48 0.544 0.608 0.642 0.683 0.774 0.871 0.976 1.088 1.21 1.342 1.486 1.641 1.809 1.99 2.184 2.393 2.615 2.85 3.099 3.36 3.634 3.918 4.213 4.516 4.828 5.146 5.47 5.798 6.13 6.463 6.797 7.13 7.46 7.786 8.107 8.421 8.727 9.022 9.306 9.575 9.83 10.067 10.286 10.485 10.662 10.816 10.945 11.049 11.126 11.176 11.199 11.2 11.197 11.181 11.153 11.113 11.062 11.001 10.93 10.85 10.762 10.666 10.563 10.453 10.338 10.217 10.091 9.961 9.827 9.69 9.55 9.407 9.262 9.115 8.967 8.818 8.668 8.518 8.367 8.216 8.066 7.916 7.766 7.618 7.47 7.323 7.178 7.034 6.891 6.75 6.611 6.473 6.337 6.203 6.07 5.94 5.812 5.686 5.561 5.439 5.319 5.201 5.085 4.971 4.859 4.75 4.642 4.536 4.433 4.331 4.232 4.134 4.039 3.945 3.854 3.764 3.676 3.591 3.507 3.424 3.344 3.265 3.188 3.113 3.039 2.967 2.897 2.828 2.761 2.695 2.631 2.568 2.507 2.447 2.389 2.332 2.276 2.221 2.168 2.116 2.065 2.015 1.967 1.92 1.873 1.828 1.784 1.741 1.699 1.658 1.618 1.579 1.541 1.504 1.467 1.432 1.397 1.363 1.33 1.298 1.267 1.236 1.206 1.177 1.148 1.121 1.093

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.642" PeakHeight="110.0" Num="3" Error="0.0">
-24.119 5.723 -0.657
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.642" EndFrequency="11.2" PeakHeight="426.567" Num="5" zHalfNm="342.065" Error="1.559">
-240.673 1.348 0.599 -0.833 0.687
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.695" Depth="0.331"/>
<TopsideChapman PeakHeight="426.567" PeakDensity="1556327.5" PeakScaleHeight="63.436" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
