<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 21:30:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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) 21:30:00</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">
FF202628910162130009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.418" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.720" 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="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="555.000" 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="0.408" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="455.919" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="373.404" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.859" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="121.232" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.770" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.655" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="121.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.940" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="130">
<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 10.95 11.0 11.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 355.000 365.000 367.500 370.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 382.500 385.000 385.000 387.500 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 395.000 400.000 397.500 395.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 405.000 407.500 410.000 410.000 412.500 415.000 415.000 405.000 405.000 407.213 409.426 411.639 413.852 416.066 418.279 420.492 422.705 424.918 427.131 429.344 431.557 433.770 435.984 438.197 440.410 442.623 444.836 447.049 449.262 451.475 453.689 455.902 458.115 460.328 462.541 464.754 466.967 469.180 471.393 473.607 475.820 478.033 480.246 482.459 484.672 486.885 489.098 491.311 493.525 495.738 497.951 500.164 502.377 504.590 506.803 509.016 511.230 513.443 515.656 517.869 520.082 522.295 524.508 526.721 528.934 531.148 533.361 535.574 537.787 540.000 545.000 545.000 545.000 545.000 560.000 565.000 555.000 575.000 580.000 585.000 590.000 599.526 610.677 623.908 639.861 659.470
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 78 0 81 69 0 75 0 0 0 0 0 0 0 0 81 81 78 78 54 87 66 78 75 84 72 81 84 81 78 75 81 81 69 0 81 81 78 81 81 75 87 87 81 72 75 75 0 66 0 81 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 66 0 51 51 54 63 48 63 66 66 60 60 57 51 42 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 1.953125 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 2.734375 0.390625 -1.953125 1.953125 -1.953125 1.953125 -1.953125 0.390625 -1.953125 -0.390625 -1.953125 -1.953125 -2.734375 -1.953125 -1.171875 -1.953125 0.390625 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -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" >
92.562 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.206 140.0 145.0 150.0 155.0 160.0 165.0 168.411 170.0 175.0 180.0 185.0 190.0 195.0 197.617 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 455.919 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.27 0.353 0.395 0.408 0.403 0.389 0.365 0.327 0.271 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.247 0.283 0.318 0.354 0.389 0.408 0.44 0.509 0.581 0.659 0.744 0.836 0.938 1.05 1.172 1.307 1.453 1.612 1.784 1.968 2.164 2.372 2.59 2.819 3.057 3.303 3.558 3.819 4.088 4.362 4.641 4.926 5.214 5.507 5.803 6.101 6.401 6.703 7.006 7.308 7.609 7.909 8.205 8.497 8.783 9.061 9.33 9.588 9.833 10.062 10.273 10.464 10.631 10.773 10.888 10.973 11.027 11.049 11.05 11.045 11.027 10.996 10.953 10.899 10.834 10.759 10.675 10.582 10.482 10.374 10.26 10.14 10.015 9.885 9.75 9.612 9.471 9.327 9.181 9.032 8.882 8.731 8.579 8.427 8.274 8.121 7.968 7.815 7.664 7.513 7.363 7.214 7.067 6.92 6.776 6.633 6.492 6.352 6.215 6.079 5.946 5.814 5.685 5.557 5.432 5.309 5.188 5.069 4.953 4.838 4.726 4.616 4.508 4.403 4.299 4.197 4.098 4.001 3.906 3.812 3.721 3.632 3.545 3.459 3.376 3.294 3.215 3.137 3.06 2.986 2.913 2.842 2.773 2.705 2.639 2.574 2.511 2.449 2.389 2.33 2.273 2.217 2.162 2.109 2.057 2.006 1.956 1.908 1.861 1.815 1.77 1.726 1.683 1.641 1.6 1.561 1.522 1.484 1.447 1.411 1.376 1.342 1.308 1.276 1.244 1.213 1.183 1.153

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.408" PeakHeight="110.0" Num="3" Error="0.0">
-20.423 3.218 -0.233
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.408" EndFrequency="11.05" PeakHeight="455.919" Num="5" zHalfNm="373.404" Error="3.652">
-257.864 -5.97 8.373 -4.702 1.861
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.617" Depth="0.208"/>
<TopsideChapman PeakHeight="455.919" PeakDensity="1514919.4" PeakScaleHeight="61.655" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
